82 results on '"Araneda R"'
Search Results
2. Efficacy of integrating a semi-immersive virtual device in the HABIT-ILE intervention for children with unilateral cerebral palsy: a non-inferiority randomized controlled trial
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Saussez, G., Bailly, R., Araneda, R., Paradis, J., Ebner-Karestinos, D., Klöcker, A., Sogbossi, E. S., Riquelme, I., Brochard, S., and Bleyenheuft, Y.
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- 2023
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3. Activation of Microwave Fields in a Spin-Torque Nano-Oscillator by Neuronal Action Potentials
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Algarin, J. M., Ramaswamy, B., Venuti, L., Swierzbinski, M. E., Baker-McKee, J., Weinberg, I. N., Chen, Y. J., Krivorotov, I. N., Katine, J. A., Herberholz, J., Araneda, R. C., Shapiro, B., and Waks, E.
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Physics - Applied Physics - Abstract
Action potentials are the basic unit of information in the nervous system and their reliable detection and decoding holds the key to understanding how the brain generates complex thought and behavior. Transducing these signals into microwave field oscillations can enable wireless sensors that report on brain activity through magnetic induction. In the present work we demonstrate that action potentials from crayfish lateral giant neuron can trigger microwave oscillations in spin-torque nano-oscillators. These nanoscale devices take as input small currents and convert them to microwave current oscillations that can wirelessly broadcast neuronal activity, opening up the possibility for compact neuro-sensors. We show that action potentials activate microwave oscillations in spin-torque nano-oscillators with an amplitude that follows the action potential signal, demonstrating that the device has both the sensitivity and temporal resolution to respond to action potentials from a single neuron. The activation of magnetic oscillations by action potentials, together with the small footprint and the high frequency tunability, makes these devices promising candidates for high resolution sensing of bioelectric signals from neural tissues. These device attributes may be useful for design of high-throughput bi-directional brain-machine interfaces.
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- 2017
4. Protocol of changes induced by early Hand-Arm Bimanual Intensive Therapy Including Lower Extremities (e-HABIT-ILE) in pre-school children with bilateral cerebral palsy: a multisite randomized controlled trial
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Araneda, R., Sizonenko, S. V., Newman, C. J., Dinomais, M., Le Gal, G., Ebner-Karestinos, D., Paradis, J., Klocker, A., Saussez, G., Demas, J., Bailly, R., Bouvier, S., Nowak, E., Guzzetta, A., Riquelme, I., Brochard, S., Bleyenheuft, Y., and UCL - SSS/IONS/COSY - Systems & cognitive Neuroscience
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Male ,030506 rehabilitation ,extremidad superior ,parálisis cerebral ,medicine.medical_treatment ,humanos ,estudios multicéntricos como asunto ,lcsh:RC346-429 ,law.invention ,Study Protocol ,0302 clinical medicine ,Randomized controlled trial ,law ,Multicenter Studies as Topic ,Functional ability ,Child ,Biomechanical changes ,Motor skill ,Randomized Controlled Trials as Topic ,Bilateral cerebral palsy ,ddc:618 ,Rehabilitation ,Intensive training ,ensayos clínicos controlados aleatorizados como asunto ,Cognition ,General Medicine ,Bilateral ,Lower Extremity/physiopathology ,Lower Extremity ,Motor Skills ,Child, Preschool ,extremidad inferior ,Randomized controlled trials ,Female ,0305 other medical science ,Cerebral palsy ,Neuroplasticity ,Canada ,medicine.medical_specialty ,Upper Extremity/physiopathology ,habilidades motoras ,Upper Extremity ,03 medical and health sciences ,Physical medicine and rehabilitation ,modalidades de fisioterapia ,Motor Skills/physiology ,Intensive care ,medicine ,Humans ,Cerebral Palsy/rehabilitation ,Preschool ,Physical Therapy Modalities ,lcsh:Neurology. Diseases of the nervous system ,lactante ,business.industry ,Cerebral Palsy ,Infant ,medicine.disease ,Neurology (clinical) ,business ,030217 neurology & neurosurgery - Abstract
BackgroundCerebral palsy (CP), which is the leading cause of motor disability during childhood, can produce sensory and cognitive impairments at different degrees. Most recent therapeutic interventions for these patients have solely focused on upper extremities (UE), although more than 60% of these patients present lower extremities (LE) deficits. Recently, a new therapeutic concept, Hand-arm Bimanual Intensive Therapy Including Lower Extremities (HABIT-ILE), has been proposed, involving the constant stimulation of UE and LE. Based on motor skill learning principles, HABIT-ILE is delivered in a day-camp setting, promoting voluntary movements for several hours per day during 10 consecutive week days. Interestingly, the effects of this intervention in a large scale of youngsters are yet to be observed. This is of interest due to the lack of knowledge on functional, neuroplastic and biomechanical changes in infants with bilateral CP. The aim of this randomized controlled study is to assess the effects of HABIT-ILE adapted for pre-school children with bilateral CP regarding functional, neuroplastic and biomechanical factors.MethodsThis international, multicentric study will include 50 pre-school children with CP from 12 to 60months of age, comparing the effect of 50h (2weeks) of HABIT-ILE versus regular motor activity and/or customary rehabilitation. HABIT-ILE presents structured activities and functional tasks with continuous increase in difficulty while the child evolves. Assessments will be performed at 3 period times: baseline, two weeks later and 3months later. The primary outcome will be the Gross Motor Function Measure 66. Secondary outcomes will include Both Hands Assessment, Melbourne Assessment-2, Semmes-Weinstein Monofilament Test, algometry assessments, executive function tests, ACTIVLIM-CP questionnaire, Pediatric Evaluation of Disability Inventory (computer adaptative test), Young Children's Participation and Environment Measure, Measure of the Process of Care, Canadian Occupational Performance Measure, neuroimaging and kinematics.DiscussionThe results of this study should highlight the impact of a motor, intensive, goal-directed therapy (HABIT-ILE) in pre-school children at a functional, neuroplastic and biomechanical level. In addition, this changes could demonstrated the impact of this intervention in the developmental curve of each child, improving functional ability, activity and participation in short-, mid- and long-term.Name of the registryEvaluation of Functional, Neuroplastic and Biomechanical Changes Induced by an Intensive, Playful Early-morning Treatment Including Lower Limbs (EARLY-HABIT-ILE) in Preschool Children With Uni and Bilateral Cerebral Palsy (HABIT-ILE).Trial registrationNCT04017871Registration dateJuly 12, 2019., This protocol and trial is funded by La Fondation Paralysie Cerebrale (https://www.fondationparalysiecerebrale.org/).The funding body has reviewed this protocol during the selection process, but after this initial point, the Fondation Paralysie Cerebrale has not participated in the design study and will not participate in data collection, analysis, interpretation data or in writing the manuscript.
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- 2020
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5. Ligadura vaginal de arterias uterinas en hemorragia postparto: técnica simple, rápida y efectiva
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Hernán Santander M, Marcelo Araneda R, Cristián Sepúlveda M, and Roberto Velásquez G
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Postpartum hemorrhage ,Hemorragia posparto ,ligadura de arterias uterinas ,mortalidad materna ,vaginal uterine arteries ligature ,maternal mortality ,Gynecology and obstetrics ,RG1-991 - Abstract
La metrorragia posparto es una de las complicaciones más graves de la obstetricia con importante morbi-mortalidad materna. La ligadura de las arterias uterinas forma parte de la cadena de procedimientos terapéuticos. Esta comunicación muestra una paciente con hemorragia posparto tratada con ligadura vaginal de arterias uterinas, con cese del sangrado y recuperación de la paciente sin complicaciones.Postpartum hemorrhage is one of the most serious obstetrics complications with significant maternal morbidity and mortality. Uterine arteries ligature is part of the chain of therapeutic procedures. This communication presents a patient with postpartum hemorrhage treated with vaginal uterine arteries ligature with cessation of bleeding after the intervention and recovery without complications.
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- 2011
6. Functional, neuroplastic and biomechanical changes induced by early Hand-Arm Bimanual Intensive Therapy Including Lower Extremities (e-HABIT-ILE) in pre-school children with unilateral cerebral palsy: study protocol of a randomized control trial
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Araneda, R., Sizonenko, S. V., Newman, C. J., Dinomais, M., Le Gal, G., Nowak, E., Guzzetta, A., Riquelme, I., Brochard, S., Bleyenheuft, Y., Paradis, J., Ebner-Karestinos, D., Saussez, G., Klocker, A., Bailly, R., Bouvier, S., Demas, J., Laboratoire Angevin de Recherche en Ingénierie des Systèmes (LARIS), Université d'Angers (UA), Groupe d'Etude de la Thrombose de Bretagne Occidentale (GETBO), Université de Brest (UBO)-Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO)-Université de Brest (UBO), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université de Brest (UBO)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Brestois Santé Agro Matière (IBSAM), Early HABIT-ILE group, Paradis, J., Ebner-Karestinos, D., Saussez, G., Klöcker, A., Bailly, R., Bouvier, S., and Demas, J.
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030506 rehabilitation ,Neurology ,extremidad superior ,medicine.medical_treatment ,parálisis cerebral ,[SDV]Life Sciences [q-bio] ,humanos ,lcsh:RC346-429 ,law.invention ,Disability Evaluation ,Study Protocol ,0302 clinical medicine ,Randomized controlled trial ,law ,Surveys and Questionnaires ,Secondary Prevention ,Medicine ,Functional ability ,mano ,Child ,Biomechanical changes ,Motor skill ,Bilateral cerebral palsy ,ddc:618 ,Rehabilitation ,Neuronal Plasticity ,Intensive training ,General Medicine ,prevención secundaria ,Cerebral palsy ,Functional changes ,Neuroplasticity ,Toddlers ,3. Good health ,Lower Extremity/physiopathology ,Lower Extremity ,Motor Skills ,extremidad inferior ,Child, Preschool ,0305 other medical science ,medicine.medical_specialty ,Upper Extremity/physiopathology ,habilidades motoras ,Upper Extremity ,03 medical and health sciences ,Physical medicine and rehabilitation ,modalidades de fisioterapia ,Motor Skills/physiology ,plasticidad neuronal ,valoración de discapacidades ,Humans ,Preschool ,lcsh:Neurology. Diseases of the nervous system ,Physical Therapy Modalities ,lactante ,business.industry ,Hand/physiopathology ,Infant ,medicine.disease ,Hand ,Clinical trial ,Cerebral Palsy/physiopathology/therapy ,Neurology (clinical) ,business ,030217 neurology & neurosurgery - Abstract
Background Cerebral palsy (CP) causes motor, cognitive and sensory impairment at different extents. Many recent rehabilitation developments (therapies) have focused solely on the upper extremities (UE), although the lower extremities (LE) are commonly affected. Hand-arm Bimanual Intensive Therapy Including Lower Extremities (HABIT-ILE) applies the concepts of motor skill learning and intensive training to both the UE and LE. It involves constant stimulation of the UE and LE, for several hours each day over a 2-week period. The effects of HABIT-ILE have never been evaluated in a large sample of young children. Furthermore, understanding of functional, neuroplastic and biomechanical changes in infants with CP is lacking. The aim of this study is to carry out a multi-center randomized controlled trial (RCT) to evaluate the effects of HABIT-ILE in pre-school children with unilateral CP on functional, neuroplastic and biomechanical parameters. Methods This multi-center, 3-country study will include 50 pre-school children with CP aged 1-4 years. The RCT will compare the effect of 50 h (two weeks) of HABIT-ILE versus usual motor activity, including regular rehabilitation. HABIT-ILE will be delivered in a day-camp setting, with structured activities and functional tasks that will be continuously progressed in terms of difficulty. Assessments will be performed at 3 intervals: baseline (T0), two weeks later and 3 months later. Primary outcomes will be the Assisting Hand Assessment; secondary outcomes include the Melbourne Assessment-2, executive function assessments, questionnaires ACTIVLIM-CP, Pediatric Evaluation of Disability Inventory, Young Children's Participation and Environment Measure, Measure of the Process of Care, Canadian Occupational Performance Measure, as well as neuroimaging and kinematics measures. Discussion We expect that HABIT-ILE will induce functional, neuroplastic and biomechanical changes as a result of the intense, activity-based rehabilitation process and these changes will impact the whole developmental curve of each child, improving functional ability, activity and participation in the short-, mid- and long-term. Name of the registry: Changes Induced by Early HABIT-ILE in Pre-school Children With Uni- and Bilateral Cerebral Palsy (EarlyHABIT-ILE)., This protocol and trial is funded by La Fondation Paralysie Cerebrale (https://www.fondationparalysiecerebrale.org/). The funding body has reviewed this protocol during the selection process, but after this initial point, the Fondation Paralysie Cerebrale has not participated in the design study and will not participate in data collection, analysis, interpretation data or in writing the manuscript.
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- 2020
- Full Text
- View/download PDF
7. Ligadura vaginal de arterias uterinas en hemorragia postparto: técnica simple, rápida y efectiva
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Marcelo Araneda R, Cristián Sepúlveda M, Hernán Santander M, and Roberto Velásquez G
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mortalidad materna ,Hemorragia posparto ,ligadura de arterias uterinas ,Obstetrics and Gynecology - Abstract
RESUMEN La metrorragia posparto es una de las complicaciones mas graves de la obstetricia con importante morbi-mortalidad materna. La ligadura de las arterias uterinas forma parte de la cadena de procedimientos tera-peuticos. Esta comunicacion muestra una paciente con hemorragia posparto tratada con ligadura vaginal de arterias uterinas, con cese del sangrado y recuperacion de la paciente sin complicaciones. PALABRAS CLAVE: Hemorragia posparto, ligadura de arterias uterinas, mortalidad materna SUMMARY Postpartum hemorrhage is one of the most serious obstetrics complications with significant maternal morbi-dity and mortality. Uterine arteries ligature is part of the chain of therapeutic procedures. This communication presents a patient with postpartum hemorrhage treated with vaginal uterine arteries ligature with cessation of bleeding after the intervention and recovery without complications.KEY WORDS: Postpartum hemorrhage, vaginal uterine arteries ligature, maternal mortality INTRODUCCION
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- 2011
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8. Ligadura vaginal de arterias uterinas en hemorragia postparto: técnica simple, rápida y efectiva
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Santander M, Hernán, Araneda R, Marcelo, Sepúlveda M, Cristián, and Velásquez G, Roberto
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Postpartum hemorrhage ,mortalidad materna ,Hemorragia posparto ,vaginal uterine arteries ligature ,maternal mortality ,ligadura de arterias uterinas - Abstract
La metrorragia posparto es una de las complicaciones más graves de la obstetricia con importante morbi-mortalidad materna. La ligadura de las arterias uterinas forma parte de la cadena de procedimientos terapéuticos. Esta comunicación muestra una paciente con hemorragia posparto tratada con ligadura vaginal de arterias uterinas, con cese del sangrado y recuperación de la paciente sin complicaciones. Postpartum hemorrhage is one of the most serious obstetrics complications with significant maternal morbidity and mortality. Uterine arteries ligature is part of the chain of therapeutic procedures. This communication presents a patient with postpartum hemorrhage treated with vaginal uterine arteries ligature with cessation of bleeding after the intervention and recovery without complications.
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- 2011
9. Differential Muscarinic Modulation in the Olfactory Bulb
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Smith, R. S., primary, Hu, R., additional, DeSouza, A., additional, Eberly, C. L., additional, Krahe, K., additional, Chan, W., additional, and Araneda, R. C., additional
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- 2015
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10. Detection of explosives by olfactory sensory neurons
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Corcelli A, Lobasso S, Lopalco P, Dibattista M, Araneda R, Peterlin Z, and Firestein S.
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- 2010
11. Vínculos tempranos patológicos y relaciones violentas : patrón relacional transmitido transgeneracionalmente. Una revisión bibliográfica actualizada
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Araneda R., Andrea, Pérez L., Paulina, Alvarez Kozubobá, Karla, Facultad de Educación y Ciencias Sociales, and Escuela de Psicología
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Aspectos Psicológicos ,Apego ,Madre e Hijo - Abstract
Tesis (Magíster en Psicología Clínica) Este seminario se formula la siguiente pregunta: ¿Es el vínculo temprano inseguro, un potencial patrón de un modo relacional violento? Se plantea que la raíz y/o el sostenimiento de dinámicas familiares violentas, muchas veces surgen en base a eventos que sucedieron en la temprana infancia, específicamente en el vínculo primario entre madre e hijo, apego. Este vínculo se constituye como modelo interacciona}, que se repite y se reedita en distintos momentos y relaciones de la vida del ser humano. Estudios plantean la existencia de una "transmisión transgeneracional del apego", vale decir, cuidadores que han tenido un cierto estilo de apego con sus propios padres tienden a transmitir el mismo a sus hijos. En cuanto a la violencia, este patrón funciona de igual manera, lo que indica que estos modelos "disfuncionales" permiten el sostenimiento de relaciones basadas en agresión, la que es vivida activa o pasivamente. Este seminario constará de una revisión bibliográfica actualizada, por lo que está basado en autores contemporáneos con respecto a las temáticas antes mencionadas. En vista que trata de un recorrido teórico, se intentara sistematizar los conceptos más relevantes en cuanto al apego y al fenómeno de la violencia, así como su transmisión transgeneracional. En la última parte se expondrá el estudio de un caso que escenificará este hilo teórico conductor.
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- 2006
12. Caracterización epidemiológica y clínica de pacientes operados con diagnóstico de quiste branquial
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Aguirre R., Noemí, primary, Bravo C., Gustavo, additional, Araneda R., Felipe, additional, Celedon L., Carlos, additional, Gac E., Patricio, additional, and Cabané T., Patricio, additional
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- 2013
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13. Ligadura vaginal de arterias uterinas en hemorragia postparto: técnica simple, rápida y efectiva
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Santander M, Hernán, primary, Araneda R, Marcelo, additional, Sepúlveda M, Cristián, additional, and Velásquez G, Roberto, additional
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- 2011
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14. Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels in Olfactory Sensory Neurons Regulate Axon Extension and Glomerular Formation
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Mobley, A. S., primary, Miller, A. M., additional, Araneda, R. C., additional, Maurer, L. R., additional, Muller, F., additional, and Greer, C. A., additional
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- 2010
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15. Do olfactory receptors respond to explosives?
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Lopalco, P., primary, Lobasso, S., additional, Corcelli, A., additional, Dibattista, M., additional, Araneda, R., additional, Peterlin, Z., additional, and Firestein, S., additional
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- 2007
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16. Electrical Properties of Electroreceptor Cells Isolated from Skate Ampulla of Lorenzini
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Araneda, R. C., primary and Bennett, MVL., additional
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- 1993
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17. 5-Hydroxytryptamine2 and 5-hydroxytryptamine1A receptors mediate opposing responses on membrane excitability in rat association cortex
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Araneda, R., primary and Andrade, R., additional
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- 1991
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18. Biotechnological aspects in loco larvae
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Inestrosa, N. C., Labarca, R., Perelman, A., Campos, E. O., Araneda, R., Gonzalez, M., Enrique Brandan, Sanchez, J. P., and Gonzalez-Plaza, R.
19. Composition and dynamics of a chlorobenzene-degrading microbial community growing in a biotrickling filter
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Cespedes-Araneda, R., Pedes, S., Lombardot, T., Aracil, S., Seignez, C., and Holliger, C.
20. New contributions to the understanding of the geology of Il Endio, deposits of gold, silver and copper, Coquimbo, Chile.
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Araneda R. and Araneda R.
21. Gold-silver occurrences of the El Indio belt, Chile.
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Siddeley G., Araneda R., Siddeley G., and Araneda R.
- Abstract
Gold-silver prospects of the El Indio belt in the high Andes of the IV Region occur over a discontinuous strike length of 150 km and have remarkable lithological, mineralogical and tectonic similarities with the El Indio mine area. A comparison is made among some of these prospects and El Indio in the light of exploration experience over the past 5 years, with the conclusion that they are genetically similar. The areas described - El Indio, Tambo, Sancarron and Sierra Nevada - are upper Tertiary epithermal volcanic deposits, characterised by widespread hydrothermal alteration under strongly acidic and oxidising conditions. Pyroclastic volcanics (dacite tuffs) and lavas are the dominant rock types, which are concentrated in well defined eruptive centres elongated north-south. Ores are found in veins, shoots and breccias that have strong tectonic control. Gold, silver and copper deposits are accompanied by either massive sulphides, silicification, or sulphate deposition. In common with some occurrences in the USA, a predominant feature is the abundant sulphur occurring as sulphates, sulphides, sulphosalts and native sulphur. The potential economic importance of deposits of this type is clearly shown by El Indio, where combined production since 1979 and proven reserves (1988) are more than 100 t of fine gold., Gold-silver prospects of the El Indio belt in the high Andes of the IV Region occur over a discontinuous strike length of 150 km and have remarkable lithological, mineralogical and tectonic similarities with the El Indio mine area. A comparison is made among some of these prospects and El Indio in the light of exploration experience over the past 5 years, with the conclusion that they are genetically similar. The areas described - El Indio, Tambo, Sancarron and Sierra Nevada - are upper Tertiary epithermal volcanic deposits, characterised by widespread hydrothermal alteration under strongly acidic and oxidising conditions. Pyroclastic volcanics (dacite tuffs) and lavas are the dominant rock types, which are concentrated in well defined eruptive centres elongated north-south. Ores are found in veins, shoots and breccias that have strong tectonic control. Gold, silver and copper deposits are accompanied by either massive sulphides, silicification, or sulphate deposition. In common with some occurrences in the USA, a predominant feature is the abundant sulphur occurring as sulphates, sulphides, sulphosalts and native sulphur. The potential economic importance of deposits of this type is clearly shown by El Indio, where combined production since 1979 and proven reserves (1988) are more than 100 t of fine gold.
22. Geology of the Indio Sur 3 500 vein: a typical bonanza structure of the El Indio mine.
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Jannas R., Araneda R., Jannas R., and Araneda R.
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Indio Sur 3 500 is a fracture filling structure with hydrothermal breccias, ribbon or banded quartz, and colloidal deposition textures. The principal gangue mineral is silica, mainly as quartz but amorphous types such as chalcedony, opal and jasper are also common. The ore minerals are mainly sulphides and sulphosalts; gold minerals are native gold, auricupride, calaverite and krennerite., Indio Sur 3 500 is a fracture filling structure with hydrothermal breccias, ribbon or banded quartz, and colloidal deposition textures. The principal gangue mineral is silica, mainly as quartz but amorphous types such as chalcedony, opal and jasper are also common. The ore minerals are mainly sulphides and sulphosalts; gold minerals are native gold, auricupride, calaverite and krennerite.
23. The El Indio gold, silver, copper deposit.
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Walthier T.N., Araneda R., Sirvas E., Walthier T.N., Araneda R., and Sirvas E.
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El Indio's regional structural setting is dominated by volcanic rocks and prominent north-south faults paralleling the main Andean trend. The orebodies consist of a complex vein system in subvolcanic rocks. Primary mineralisation is of two basic types: quartz veins, with or without native gold; and massive enargite, pyrite and quartz veins, or stockwork (both with and without precious metals). This second type may be entirely leached at the surface. The host rocks for the veins are variable but are usually porphyritic quartz dacite. Brecciation and alteration obscure variations within the ore zone, however, only subvolcanic rocks have been identified. Due to the complex and non-uniform nature of the veins, conventional crushing and grinding is followed by selective flotation, and roasting, for copper recovery and treatment of flotation tailings by cyanidation and carbon-in-pulp for ore recovery., El Indio's regional structural setting is dominated by volcanic rocks and prominent north-south faults paralleling the main Andean trend. The orebodies consist of a complex vein system in subvolcanic rocks. Primary mineralisation is of two basic types: quartz veins, with or without native gold; and massive enargite, pyrite and quartz veins, or stockwork (both with and without precious metals). This second type may be entirely leached at the surface. The host rocks for the veins are variable but are usually porphyritic quartz dacite. Brecciation and alteration obscure variations within the ore zone, however, only subvolcanic rocks have been identified. Due to the complex and non-uniform nature of the veins, conventional crushing and grinding is followed by selective flotation, and roasting, for copper recovery and treatment of flotation tailings by cyanidation and carbon-in-pulp for ore recovery.
24. 5-Hydroxytryptamine 2 and 5-hydroxytryptamine 1A receptors mediate opposing responses on membrane excitability in rat association cortex
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Araneda, R. and Andrade, R.
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- 1991
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25. Hand-Arm Bimanual Intensive Therapy Including Lower Extremities in Infants With Unilateral Cerebral Palsy: A Randomized Clinical Trial.
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Carton de Tournai A, Herman E, Ebner-Karestinos D, Gathy E, Araneda R, Renders A, De Clerck C, Kilcioglu S, Dricot L, Macq B, Vandermeeren Y, and Bleyenheuft Y
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- Humans, Male, Female, Infant, Lower Extremity physiopathology, Hand physiopathology, Treatment Outcome, Motor Skills physiology, Physical Therapy Modalities, Belgium, Cerebral Palsy therapy, Cerebral Palsy physiopathology
- Abstract
Importance: Earlier detection of cerebral palsy (CP) and the high neuroplastic potential during the first years of life have motivated a search for early interventions to improve children's long-term motor abilities., Objective: To determine the effectiveness of baby Hand-Arm Bimanual Intensive Therapy Including Lower Extremities (HABIT-ILE) to improve motor function in infants with unilateral CP (UCP)., Design, Setting, and Participants: This parallel group, 1:1, randomized clinical trial was conducted between December 1, 2020, and September 9, 2022, in infants recruited through centers specializing in CP treatment and parents' spontaneous applications. Therapy took place in Brussels, Belgium, from March 8, 2021, through June 17, 2022. Infants were matched in pairs by age and lesion type and randomized to either the treatment or control group. Infants were assessed at baseline (T0) and 1 (T1) and 3 months (T2) follow-up. Inclusion criteria were aged 6 to 18 months at T0 (corrected age if preterm birth), a diagnosis or being at risk of UCP, and the ability to comply with the testing and training procedures. Exclusion criteria were uncontrolled seizures, botulinum toxin injections, orthopedic surgery, or specific intensive therapy within 6 months before and until the end of the study., Intervention: Infants in the treatment group received 50 hours of baby HABIT-ILE over 2 weeks, while those in the control group continued their usual motor activities., Main Outcomes and Measures: The primary outcome was use of the more affected hand as measured using the Mini-Assisting Hand Assessment (Mini-AHA). Secondary outcomes included Canadian Occupational Performance Measure (COPM) performance and satisfaction scores, Gross Motor Function Measure-66 (GMFM-66) scores, and other motor and functional outcomes. Between-group comparisons were calculated using repeated-measures analysis of variance (2 groups × 3 assessment times). Effect sizes were reported as partial η squared (ηp2) (small, 0.01; medium, 0.06; large, 0.14)., Results: Of the 48 infants entering the study, 46 (mean [SD] age, 13.3 [4.1] months; 27 boys [58%]) were included in the final analyses, with 24 in the treatment group and 22 in the control group. Group × assessment time interactions showed significant improvements that favored the treatment group for the Mini-AHA (mean [SE] difference from T0 to T2, 7.4 [1.4] Mini-AHA units in the treatment group vs 1.9 [1.5] Mini-AHA units in the control group; P = .008; ƞp2 = 0.11) and for both parts of the COPM (mean [SE] difference from T0 to T2, 5.0 [0.4] in the treatment group vs 2.9 [0.4] in the control group; P < .001; ƞp2 = 0.35 for the performance score and 4.4 [0.4] in the treatment group vs 2.1 [0.4] in the control group; P < .001; ƞp2 = 0.33 for the satisfaction score). Although both groups improved in the GMFM-66 (mean [SE] difference from T0 to T2, 6.6% [0.7%] logits in the treatment group vs 5.5% [0.7%] logits in the control group; P < .001; ηp2 = 0.68), there was no significant interaction (P = .43; ηp2 = 0.02)., Conclusions and Relevance: This randomized clinical trial demonstrates the feasibility of delivering 50 hours of HABIT-ILE over a 2-week period in infants with UCP. These findings show that the intervention is effective in improving motor abilities, as revealed by an increase in the use of the more affected hand in bimanual tasks and in enhanced reported functional goal outcomes., Trial Registration: ClinicalTrials.gov Identifier: NCT04698395.
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- 2024
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26. Early intensive rehabilitation reverses locomotor disruption, decrease brain inflammation and induces neuroplasticity following experimental Cerebral Palsy.
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Sanches E, Ho D, van de Looij Y, Aebi Toulotte A, Baud L, Bouteldja F, Barraud Q, Araneda R, Bleyenheuft Y, Brochard S, Kathe C, Courtine G, and Sizonenko S
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- Animals, Rats, Female, Male, Brain metabolism, Brain physiopathology, Pregnancy, Recovery of Function physiology, Encephalitis metabolism, Encephalitis physiopathology, Encephalitis rehabilitation, Gait physiology, Physical Conditioning, Animal physiology, Physical Conditioning, Animal methods, Neuroinflammatory Diseases metabolism, Neuroinflammatory Diseases physiopathology, Cerebral Palsy rehabilitation, Cerebral Palsy physiopathology, Neuronal Plasticity physiology, Rats, Wistar, Locomotion physiology, Disease Models, Animal
- Abstract
Background: Cerebral Palsy (CP) is a major cause of motor and cognitive disability in children due to injury to the developing brain. Early intensive sensorimotor rehabilitation has been shown to change brain structure and reduce CP symptoms severity. We combined environmental enrichment (EE) and treadmill training (TT) to observe the effects of a one-week program of sensorimotor stimulation (EETT) in animals exposed to a CP model and explored possible mechanisms involved in the functional recovery., Methods: Pregnant Wistar rats were injected with Lipopolysaccharide (LPS - 200 µg/kg) intraperitoneally at embryonic days 18 and 19. At P0, pups of both sexes were exposed to 20' anoxia at 37 °C. From P2 to P21, hindlimbs were restricted for 16 h/day during the dark cycle. EETT lasted from P21 to P27. TT - 15 min/day at 7 cm/s. EE - 7 days in enriched cages with sensorimotor stimulus. Functional 3D kinematic gait analysis and locomotion were analyzed. At P28, brains were collected for ex-vivo MRI and histological assessment. Neurotrophins and key proteins involved in CNS function were assessed by western blotting., Results: CP model caused gross and skilled locomotor disruption and altered CNS neurochemistry. EETT reversed locomotor dysfunction with minor effects over gait kinematics. EETT also decreased brain inflammation and glial activation, preserved myelination, upregulated BDNF signaling and modulated the expression of proteins involved in excitatory synaptic function in the brain and spinal cord., Conclusions: Using this translational approach based on intensive sensorimotor rehabilitation, we highlight pathways engaged in the early developmental processes improving neurological recovery observed in CP., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024. Published by Elsevier Inc.)
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- 2024
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27. Effects of Therapies Involving Plyometric-Jump Training on Physical Fitness of Youth with Cerebral Palsy: A Systematic Review with Meta-Analysis.
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Garcia-Carrillo E, Ramirez-Campillo R, Izquierdo M, Elnaggar RK, Afonso J, Peñailillo L, Araneda R, Ebner-Karestinos D, and Granacher U
- Abstract
The aim of this systematic review was to assess the effects of plyometric-jump training (PJT) on the physical fitness of youth with cerebral palsy (CP) compared with controls (i.e., standard therapy). The PRISMA 2020 guidelines were followed. Eligibility was assessed using the PICOS approach. Literature searches were conducted using the PubMed, Web of Science, and SCOPUS databases. Methodological study quality was assessed using the PEDro scale. Data were meta-analyzed by applying a random-effects model to calculate Hedges' g effect sizes (ES), along with 95% confidence intervals (95% CI). The impact of heterogeneity was assessed ( I
2 statistic), and the certainty of evidence was determined using the GRADE approach. Eight randomized-controlled studies with low-to-moderate methodological quality were included, involving male (n = 225) and female (n = 138) youth aged 9.5 to 14.6 years. PJT interventions lasted between 8 and 12 weeks with 2-4 weekly sessions. Compared with controls, PJT improved the muscle strength (ES = 0.66 [moderate], 95% CI = 0.36-0.96, p < 0.001, I2 = 5.4%), static (ES = 0.69 [moderate], 95% CI= 0.33-1.04, p < 0.001, I2 = 0.0%) and dynamic balance (ES = 0.85 [moderate], 95% CI = 0.12-1.58, p = 0.023, I2 = 81.6%) of youth with CP. Therefore, PJT improves muscle strength and static and dynamic balance in youth with CP compared with controls. However, more high-quality randomized-controlled trials with larger sample sizes are needed to provide a more definitive recommendation regarding the use and safety of PJT to improve measures of physical fitness.- Published
- 2024
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28. Baby HABIT-ILE intervention: study protocol of a randomised controlled trial in infants aged 6-18 months with unilateral cerebral palsy.
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Carton de Tournai A, Herman E, Gathy E, Ebner-Karestinos D, Araneda R, Dricot L, Macq B, Vandermeeren Y, and Bleyenheuft Y
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- Infant, Newborn, Infant, Humans, Child, Preschool, Upper Extremity, Hand, Parents education, Randomized Controlled Trials as Topic, Cerebral Palsy therapy, Brain Injuries
- Abstract
Introduction: Research using animal models suggests that intensive motor skill training in infants under 2 years old with cerebral palsy (CP) may significantly reduce, or even prevent, maladaptive neuroplastic changes following brain injury. However, the effects of such interventions to tentatively prevent secondary neurological damages have never been assessed in infants with CP. This study aims to determine the effect of the baby Hand and Arm Bimanual Intensive Therapy Including Lower Extremities (baby HABIT-ILE) in infants with unilateral CP, compared with a control intervention., Methods and Analysis: This randomised controlled trial will include 48 infants with unilateral CP aged (corrected if preterm) 6-18 months at the first assessment. They will be paired by age and by aetiology of the CP, and randomised into two groups (immediate and delayed). Assessments will be performed at baseline and at 1 month, 3 months and 6 months after baseline. The immediate group will receive 50 hours of baby HABIT-ILE intervention over 2 weeks, between first and second assessment, while the delayed group will continue their usual activities. This last group will receive baby HABIT-ILE intervention after the 3-month assessment. Primary outcome will be the Mini-Assisting Hand Assessment. Secondary outcomes will include behavioural assessments for gross and fine motricity, visual-cognitive-language abilities as well as MRI and kinematics measures. Moreover, parents will determine and score child-relevant goals and fill out questionnaires of participation, daily activities and mobility., Ethics and Dissemination: Full ethical approval has been obtained by the Comité d'éthique Hospitalo-Facultaire/Université catholique de Louvain , Brussels (2013/01MAR/069 B403201316810g). The recommendations of the ethical board and the Belgian law of 7 May 2004 concerning human experiments will be followed. Parents will sign a written informed consent ahead of participation. Findings will be published in peer-reviewed journals and conference presentations., Trial Registration Number: NCT04698395. Registered on the International Clinical Trials Registry Platform (ICTRP) on 2 December 2020 and NIH Clinical Trials Registry on 6 January 2021. URL of trial registry record: https://clinicaltrials.gov/ct2/show/NCT04698395?term=bleyenheuft&draw=1&rank=7., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. Re-use permitted under CC BY. Published by BMJ.)
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- 2024
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29. Changes Induced by Early Hand-Arm Bimanual Intensive Therapy Including Lower Extremities in Young Children With Unilateral Cerebral Palsy: A Randomized Clinical Trial.
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Araneda R, Ebner-Karestinos D, Paradis J, Klöcker A, Saussez G, Demas J, Bailly R, Bouvier S, Carton de Tournai A, Herman E, Souki A, Le Gal G, Nowak E, Sizonenko SV, Newman CJ, Dinomais M, Riquelme I, Guzzetta A, Brochard S, and Bleyenheuft Y
- Subjects
- Female, Child, Humans, Child, Preschool, Prospective Studies, Physical Therapy Modalities, Canada, Upper Extremity, Lower Extremity, Cerebral Palsy therapy
- Abstract
Importance: Intensive interventions are provided to young children with unilateral cerebral palsy (UCP), classically focused on the upper extremity despite the frequent impairment of gross motor function. Hand-Arm Bimanual Intensive Therapy Including Lower Extremities (HABIT-ILE) effectively improves manual dexterity and gross motor function in school-aged children., Objective: To verify if HABIT-ILE would improve manual abilities in young children with UCP more than usual motor activity., Design, Setting, and Participants: This prospective randomized clinical trial (November 2018 to December 2021), including 2 parallel groups and a 1:1 allocation, recruitment took place at European university hospitals, cerebral palsy specialized centers, and spontaneous applications at 3 sites: Brussels, Belgium; Brest, France; and Pisa, Italy. Matched (age at inclusion, lesion type, cause of cerebral palsy, and affected side) pairs randomization was performed. Young children were assessed at baseline (T0), 2 weeks after baseline (T1), and 3 months after baseline (T2). Health care professionals and assessors of main outcomes were blinded to group allocation. At least 23 young children (in each group) aged 12 to 59 months with spastic/dyskinetic UCP and able to follow instructions were needed. Exclusion criteria included uncontrolled seizures, scheduled botulinum toxin injections, orthopedic surgery scheduled during the 6 months before or during the study period, severe visual/cognitive impairments, or contraindications to magnetic resonance imaging., Interventions: Two weeks of usual motor activity including usual rehabilitation (control group) vs 2 weeks (50 hours) of HABIT-ILE (HABIT-ILE group)., Main Outcomes and Measures: Primary outcome: Assisting Hand Assessment (AHA); secondary outcomes: Gross Motor Function Measure-66 (GMFM-66), Pediatric Evaluation of Disability Inventory-Computer Adaptive Test (PEDI-CAT), and Canadian Occupational Performance Measure (COPM)., Results: Of 50 recruited young children (26 girls [52%], median age; 35.3 months for HABIT-ILE group; median age, 32.8 months for control group), 49 were included in the final analyses. Change in AHA score from T0 to T2 was significantly greater in the HABIT-ILE group (adjusted mean score difference [MD], 5.19; 95% CI, 2.84-7.55; P < .001). Changes in GMFM-66 (MD, 4.72; 95% CI, 2.66-6.78), PEDI-CAT daily activities (MD, 1.40; 95% CI, 0.29-2.51), COPM performance (MD, 3.62; 95% CI, 2.91-4.32), and satisfaction (MD, 3.53; 95% CI, 2.70-4.36) scores were greater in the HABIT ILE group., Conclusions and Relevance: In this clinical trial, early HABIT-ILE was shown to be an effective treatment to improve motor performance in young children with UCP. Moreover, the improvements had an impact on daily life activities of these children., Trial Registration: ClinicalTrials.gov Identifier: NCT04020354.
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- 2024
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30. Evaluation of ALBA device for upper extremity motor function in adults with subacute and chronic acquired brain injury: a randomised controlled trial protocol in a tertiary clinic of the metropolitan region of Chile.
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Salazar-Cifuentes P, Contreras T, Hernández E, Leiva-Abarca E, Castro-Flores P, San Juan D, Araneda R, and Ebner-Karestinos D
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- Adult, Humans, Chile, Randomized Controlled Trials as Topic, Recovery of Function, Treatment Outcome, Upper Extremity, Brain Injuries complications, Stroke complications, Stroke Rehabilitation methods
- Abstract
Introduction: Stroke is a significant worldwide cause of death and a prevalent contributor to long-term disability among adults. Survivors commonly encounter a wide array of motor, sensory and cognitive impairments. Rehabilitation interventions, mainly targeting the upper extremities, include a wide array of components, although the evidence indicates that the intensity of practice and task-specific training play crucial roles in facilitating effective results. Assisted therapy with electronic devices designed for the affected upper extremity could be employed to enable partial or total control of this limb, while simultaneously incorporating the aforementioned characteristics in the rehabilitation process., Methods and Analysis: 32 adults who had a subacute or chronic stroke, aged over 18 years old, will be included for this randomised controlled trial aiming to determine the non-inferiority effect of the inclusion of a robotic device (ALBA) to regular treatment against only regular rehabilitation. Participants will be assessed before and after 4 weeks of intervention and at 3 months of follow-up. The primary outcome will be the Fugl-Meyer assessment for upper extremities; secondary outcomes will include the questionnaires Functional Independence Measure, Medical Outcomes Study 36-item Short-Form Health Survey as well as the System Usability Scale., Ethics and Dissemination: Full ethical approval was obtained for this study from the scientific and ethical review board Servicio de Salud Metropolitano Oriente of Santiago (approval number: SSMOriente030522), and the recommendations of the Chilean law no 20120 of 7 September 2006, concerning scientific research in the human being, its genome and human cloning, will be followed. Ahead of inclusion, potential participants will read and sign a written informed consent form. Future findings will be presented and published in conferences and peer-reviewed journals., Trial Registration Number: International ClinicalTrials.gov Registry (NCT05824416; https://clinicaltrials.gov/ct2/show/NCT05824416?term=uMOV&draw=2&rank=1)., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
- Published
- 2023
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31. Short- to Long-Term Effects of Virtual Reality on Motor Skill Learning in Children With Cerebral Palsy: Systematic Review and Meta-Analysis.
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Kilcioglu S, Schiltz B, Araneda R, and Bleyenheuft Y
- Abstract
Background: Many studies have started integrating virtual reality (VR) into neurorehabilitation for children with cerebral palsy (CP). The results of the effects of VR on motor skill learning, including the short- to long-term results of relevant studies, must be pooled in a generic framework., Objective: This systematic review and meta-analysis aimed to investigate the short- to long-term effects of therapies including VR on motor skill learning in children with CP., Methods: Two examiners followed the inclusion and exclusion criteria of the "Participant, Intervention, Control, and Outcome" framework. Randomized controlled trials (RCTs) and non-RCTs were considered if they compared VR-included interventions with control groups on motor functions and daily life activities in children with CP. PubMed, ScienceDirect, Embase, and IEEE Xplore databases were searched. The modified Downs and Black assessment was used to assess the methodological quality of the included studies. Meta-analyses and subgroup analyses for RCTs were conducted whenever possible., Results: A total of 7 RCTs, 2 non-RCTs, and 258 children with CP were included. The priority focus of 78% (7/9) of the studies was upper limb functions. There was a significant short-term effect of adding VR to conventional therapies on upper limb functions when compared with conventional therapies (P=.04; standardized mean difference [SMD]=0.39, 95% CI 0.01-0.76). The overall medium- to long-term effects showed a trend toward favoring the VR group, although the difference was not statistically significant (P=.06; SMD=0.37, 95% CI -0.02 to 0.77). For balance (P=.06; SMD=1.04, 95% CI -0.04 to 2.12), gross motor functions (P=.30; SMD=2.85, 95% CI -2.57 to 8.28), and daily life activities outcomes (P=.21; SMD=0.29, 95% CI -0.16 to 0.74), the overall effect in the short term also showed a trend toward favoring the VR group, but these results were not statistically significant., Conclusions: VR seems to have additional benefits for motor skill learning in children with CP. Studies with follow-up outcomes of VR training focusing on balance and gross motor functions in patients with CP were quite limited. Future research on balance and gross motor function outcomes should target particularly long-term results of therapies including VR on motor skill learning., Trial Registration: PROSPERO International Prospective Register of Systematic Reviews CRD42021227734; https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42021227734., (©Seyma Kilcioglu, Benoît Schiltz, Rodrigo Araneda, Yannick Bleyenheuft. Originally published in JMIR Serious Games (https://games.jmir.org), 12.09.2023.)
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- 2023
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32. Hand-Arm Bimanual Intensive Therapy Including Lower Extremities (HABIT-ILE) in adults with chronic stroke: protocol of a randomised controlled trial.
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Ebner-Karestinos D, Gathy E, Carton de Tournai A, Herman E, Araneda R, Dricot L, Macq B, Vandermeeren Y, and Bleyenheuft Y
- Subjects
- Humans, Adult, Activities of Daily Living, Quality of Life, Lower Extremity, Habits, Randomized Controlled Trials as Topic, Stroke complications, Stroke Rehabilitation
- Abstract
Introduction: Stroke causes multiple deficits including motor, sensitive and cognitive impairments, affecting also individual's social participation and independence in activities of daily living (ADL) impacting their quality of life. It has been widely recommended to use goal-oriented interventions with a high amount of task-specific repetitions. These interventions are generally focused only on the upper or lower extremities separately, despite the impairments are observed at the whole-body level and ADL are both frequently bimanual and may require moving around. This highlights the need for interventions targeting both upper and lower extremities. This protocol presents the first adaptation of Hand-Arm Bimanual Intensive Therapy Including Lower Extremities (HABIT-ILE) for adults with acquired hemiparesis., Methods and Analysis: This randomised controlled trial will include 48 adults with chronic stroke, aged ≥40 years. This study will compare the effect of 50 hours of HABIT-ILE against usual motor activity and regular rehabilitation. HABIT-ILE will be provided in a 2-week, adult's day-camp setting, promoting functional tasks and structured activities. These tasks will continuously progress by increasing their difficulty. Assessed at baseline, 3 weeks after and at 3 months, the primary outcome will be the adults-assisting-hand-assessment stroke; secondary outcomes include behavioural assessments for hand strength and dexterity, a motor learning robotic medical device for quality of bimanual motor control, walking endurance, questionnaires of ADL, stroke impact on participation and self-determined patient-relevant goals, besides neuroimaging measures., Ethics and Dissemination: This study has full ethical approval from the Comité d'éthique Hospitalo-Facultaire/Université catholique de Louvain , Brussels (reference number: 2013/01MAR/069) and the local medical Ethical Committee of the CHU UCL Namur-site Godinne. Recommendations of the ethical board and the Belgian law of 7 May 2004, concerning human experiments will be followed. Participants will sign a written informed consent ahead of participation. Findings will be published in peer-reviewed journals and conference presentations., Trial Registration Number: NCT04664673., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
- Published
- 2023
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33. Commentary on "Hand-Arm Bimanual Intensive Training in Virtual Reality: A Feasibility Study".
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Ebner-Karestinos D and Araneda R
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- Humans, Feasibility Studies, Hand, Virtual Reality
- Abstract
Competing Interests: The authors declare no conflict of interest.
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- 2023
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34. Mirror movements after bimanual intensive therapy in children with unilateral cerebral palsy: A randomized controlled trial.
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Araneda R, Herman E, Delcour L, Klöcker A, Saussez G, Paradis J, Ebner-Karestinos D, and Bleyenheuft Y
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- Activities of Daily Living, Canada, Child, Female, Hand, Humans, Male, Physical Therapy Modalities, Upper Extremity, Cerebral Palsy therapy, Movement Disorders
- Abstract
Aim: To investigate potential changes in mirror movements after Hand and Arm Bimanual Intensive Therapy Including Lower Extremity (HABIT-ILE) training in children with unilateral cerebral palsy (CP)., Method: Thirty-one children with unilateral CP (mean age 9 years 4 months, SD 4 years 3 months; range 5 years 4 months-17 years 3 months; 14 females, 17 males) were randomized to either a control or treatment group. After allocation, children were assessed three times: before (T1, baseline) and after (T2) a 2-week interval and again at 3 months after T1 (T3) as follow-up. Between T1 and T2, the treatment group received 90 hours of HABIT-ILE training, while the control group continued their customary treatment. Mirror movements were assessed in all children using the Woods and Teuber Scale, as well as the Assisting Hand Assessment, Pediatric Evaluation of Disability Inventory, and Canadian Occupational Performance Measure., Results: Repeated measures analysis of variance indicated a significant decrease in mirror movements in the more-affected (mean difference = 0.97; 95% confidence interval [CI] = 0.51-1.42; p < 0.001) and less-affected (mean difference = 0.71; 95% CI = 0.37-1.0; p < 0.001) hands of children after HABIT-ILE; these improvements were maintained at the 3-month follow-up. Moreover, the mirror movement changes observed at the second assessment (T2) were inversely correlated with changes in the assessment of activities of daily living, especially in the less-affected hand., Interpretation: HABIT-ILE decreased the intensity of mirror movements in a group of children with CP. Furthermore, mirror movement changes were associated with bimanual performance and activities of daily living in these children., What This Paper Adds: The intensity of mirror movements decreased in both hands after 2 weeks of Hand and Arm Bimanual Intensive Therapy Including Lower Extremity (HABIT-ILE) training. Mirror movement changes were maintained at the 3-month follow-up after HABIT-ILE. Mirror movement changes were associated with improvements in bimanual performance and activities of daily living., (© 2022 Mac Keith Press.)
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- 2022
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35. Impact of early brain lesions on the optic radiations in children with cerebral palsy.
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Araneda R, Ebner-Karestinos D, Dricot L, Herman E, Hatem SM, Friel KM, Gordon AM, and Bleyenheuft Y
- Abstract
Due to their early brain lesion, children with unilateral spastic cerebral palsy (USCP) present important changes in brain gray and white matter, often manifested by perturbed sensorimotor functions. We predicted that type and side of the lesion could influence the microstructure of white matter tracts. Using diffusion tensor imaging in 40 children with USCP, we investigated optic radiation (OR) characteristics: fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD) and radial diffusivity (RD). First, we compared the OR of the lesional and non-lesional hemisphere. Then we evaluated the impact of the brain lesion type (periventricular or cortico-subcortical) and side in the differences observed in the lesional and non-lesional OR. Additionally, we examined the relationship between OR characteristics and performance of a visuospatial attention task. We observed alterations in the OR of children with USCP on the lesional hemisphere compared with the non-lesional hemisphere in the FA, MD and RD. These differences were influenced by the type of lesion and by the side of the lesion. A correlation was also observed between FA, MD and RD and the visuospatial assessment mainly in children with periventricular and right lesions. Our results indicate an important role of the timing and side of the lesion in the resulting features of these children's OR and probably in the compensation resulting from neuroplastic changes., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Araneda, Ebner-Karestinos, Dricot, Herman, Hatem, Friel, Gordon and Bleyenheuft.)
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- 2022
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36. Effects of Sport-Based Exercise Interventions on Executive Function in Older Adults: A Systematic Review and Meta-Analysis.
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Contreras-Osorio F, Ramirez-Campillo R, Cerda-Vega E, Campos-Jara R, Martínez-Salazar C, Araneda R, Ebner-Karestinos D, Arellano-Roco C, and Campos-Jara C
- Subjects
- Aged, Exercise, Exercise Therapy, Humans, Software, Executive Function physiology, Sports
- Abstract
Exercise programs of moderate-to-vigorous intensity have been shown to improve the cognitive performance of older people. However, the specific effects of sports-based exercise programs on cognitive performance, particularly executive functions, remain unclear. Therefore, the purpose of this study is to clarify the effects of sports-based exercise programs on executive functions in older adults using a systematic review and meta-analysis of the scientific literature. A systematic review was conducted between 1 March and 1 July 2022, to look for published scientific evidence that analyzed different sports programs that may have affected executive function in healthy older adults. Longitudinal studies, which assessed the effects of sports interventions on healthy older adults, were identified through a systematic search of the four principal electronic databases: Web of Science, PubMed, Scopus, and EBSCO. A total of nine studies with a total of 398 subjects met the inclusion criteria and were classified based on one or more of the following categories: working memory, inhibition, and cognitive flexibility. The DerSimonian and Laird random-effects model was performed using the Comprehensive Meta-Analysis software to facilitate the analysis of the studies. Statistical significance was set at p ≤ 0.05. In terms of working memory, a small but positive significant effect was noted for the intervention group compared to the control group (effect size (ES) = 0.35, 95% confidence interval (CI) = 0.04-0.67; p = 0.029; I
2 = 36.7%); in terms of inhibition, the intervention had a small favoring but no significant effect compared to the control group (ES = 0.20, 95% CI = -0.42-0.84; p = 0.517; I2 = 78.8%); and in terms of cognitive flexibility, the intervention had a small favoring but no significant effect compared to the control group (ES = 0.39, 95% CI = -0.11-0.89; p = 0.131; I2 = 75.5%). Our findings suggest that healthy older adults should be encouraged to participate in sports to improve their working memory; however, more studies are required in this area to reach more robust conclusions. This systematic review was registered with the International Prospective Register of Systematic Reviews (registration number: CRD42022284788).- Published
- 2022
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37. Efficacy of hand-arm bimanual intensive therapy including lower extremities (HABIT-ILE) in young children with bilateral cerebral palsy (GMFCS III-IV) in a low and middle-income country: protocol of a randomised controlled trial.
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Sogbossi ES, Sotindjo Adon S, Adjagodo L, Dossou S, Dakè H, Ebner-Karestinos D, Araneda R, Saussez G, Paradis J, Kpadonou TG, and Bleyenheuft Y
- Subjects
- Benin, Canada, Child, Child, Preschool, Developing Countries, Habits, Humans, Lower Extremity, Randomized Controlled Trials as Topic, Cerebral Palsy
- Abstract
Introduction: Cerebral palsy (CP) is highly prevalent in sub-Saharan Africa, where clinically-based studies have shown a considerable over-representation of the severe bilateral subtype. However, children's access to rehabilitation care is limited by many local factors, notably the lacking of rehabilitation services, insufficient knowledge of caregivers and financial constraints. In such a context there is an urgent need for studies of the evidence-based rehabilitation approach. Here, we describe the protocol of a randomised controlled study to investigate the efficacy of Hand-Arm Bimanual Intensive Therapy Including the Lower Extremities (HABIT-ILE) in young children with bilateral CP in Benin Republic, a representative low and middle-income country of western Africa., Methods and Analysis: Forty children with bilateral CP aged between 24 and 59 months and with level III-IV in the gross motor function classification will be randomised to either a high intensity conventional therapy or HABIT-ILE therapy. Both therapies will be delivered as a day-camp model over 2 weeks to a total of 50 hours (5 hours per day). The assessor-blinded primary outcomes will include the gross motor function measure and both hands assessment. Secondary outcomes will be the adapted version of the ACTIVLIM-CP questionnaire, the Canadian Occupational Performance Measure, and a perception of CP interview form. Children will be assessed at baseline, after intervention and at 6-week follow-up. A 2 (group)×3 (test sessions) repeated analysis of variance will evaluate changes after the interventions., Ethics and Dissemination: This study has been approved by the ethics committee of the rehabilitation department of the National Teaching Hospital Hubert Koutoukou Maga of Cotonou, Benin (approval decision: N°01-2019/MS/CNHU-HKM/CEI/CUMPR). All participants' parents/caregivers will provide their written informed consent. Data will be managed with confidentiality., Trial Registration Number: PACTR201911894444879., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
- Published
- 2021
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38. Intensive Bimanual Intervention for Children Who Have Undergone Hemispherectomy: A Pilot Study.
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Robert MT, Ferre CL, Chin KY, Brandao MB, Carmel J, Araneda R, Bleyenheuft Y, Friel K, and Gordon AM
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- Canada, Child, Hand, Humans, Pilot Projects, Treatment Outcome, Upper Extremity surgery, Cerebral Palsy, Hemispherectomy
- Abstract
Purpose: To conduct a pilot study to assess the feasibility and effectiveness of an intensive bimanual intervention on upper limb function in children who have undergone hemispherectomy., Methods: Thirteen children received 90 hours of intensive bimanual training (Hand-Arm Bimanual Intensive Therapy, HABIT). The Jebsen-Taylor Test of Hand Function (JTTHF), Box and Block Test (BBT), Assisting Hand Assessment (AHA), ABILHAND-Kids, and Canadian Occupational Performance Measure (COPM) were assessed by a masked clinician twice before, immediately, and 6 months after treatment., Results: Significant improvements over time were found in the JTTHF, AHA, ABILHAND-Kids, and COPM., Conclusion: Completion of HABIT was feasible for children with hemispherectomy. Improvement of bimanual function and functional goals can be related to the nature of the activities prioritized in HABIT training., Competing Interests: The authors declare no conflicts of interest., (Copyright © 2021 Academy of Pediatric Physical Therapy of the American Physical Therapy Association.)
- Published
- 2021
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39. Feasibility and effectiveness of HABIT-ILE in children aged 1 to 4 years with cerebral palsy: A pilot study.
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Araneda R, Klöcker A, Ebner-Karestinos D, Sogbossi ES, Renders A, Saussez G, Paradis J, and Bleyenheuft Y
- Subjects
- Child, Preschool, Feasibility Studies, Female, Hand, Hand Strength physiology, Humans, Infant, Male, Motor Skills physiology, Pilot Projects, Treatment Outcome, Cerebral Palsy rehabilitation, Exercise Therapy methods, Functional Laterality physiology, Physical Therapy Modalities
- Published
- 2021
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40. Brain activation changes following motor training in children with unilateral cerebral palsy: An fMRI study.
- Author
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Araneda R, Dricot L, Ebner-Karestinos D, Paradis J, Gordon AM, Friel KM, and Bleyenheuft Y
- Subjects
- Child, Humans, Magnetic Resonance Imaging, Brain diagnostic imaging, Brain physiology, Cerebral Palsy therapy, Motor Skills, Physical Therapy Modalities
- Abstract
Background: Intensive motor-learning-based interventions have demonstrated efficacy for improving motor function in children with unilateral spastic cerebral palsy (USCP). Although this improvement has been associated mainly with neuroplastic changes in the primary sensori-motor cortices, this plasticity may also involve a wider fronto-parietal network for motor learning., Objective: To determine whether hand-arm bimanual intensive therapy including lower extremities (HABIT-ILE) induces brain activation changes in an extensive network for motor skill learning and whether these changes are related to functional changes observed after HABIT-ILE., Methods: In total, 25 children with USCP were behaviourally assessed in manual dexterity and everyday activities before and after HABIT-ILE. Functional imagery monitored brain activity while participants manipulated objects using their less-affected, more-affected or both hands. Two random-effects-group analyses performed at the whole-brain level assessed the brain activity network before and after therapy. Three other random-effects-group analyses assessed brain activity changes after therapy. Spearman's correlations were used to evaluate the correlation between behavioural and brain activity changes., Results: The same fronto-parietal network was identified before and after therapy. After the intervention, the more-affected hand manipulation elicited a decrease in activity on the motor cortex of the non-lesional hemisphere and an increase in activity on motor areas of the lesional hemisphere. The less-affected hand manipulation generated a decrease in activity of sensorimotor areas in the non-lesional hemisphere. Both-hands manipulation elicited an increase in activity of both hemispheres. Furthermore, we observed an association between brain activity changes and changes in everyday activity assessments., Conclusion: Brain activation changes were observed in a fronto-parietal network underlying motor skill learning with HABIT-ILE in children with USCP. Two different patterns were observed, probably related to different phases of motor skill learning, representing an increased practice-dependent brain recruitment or a brain activation refinement by more efficient means. CLINICALTRIALS.GOV: NCT01700777 &NCT02667613., (Copyright © 2021 The Author(s). Published by Elsevier Masson SAS.. All rights reserved.)
- Published
- 2021
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41. Beat Detection Recruits the Visual Cortex in Early Blind Subjects.
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Araneda R, Silva Moura S, Dricot L, and De Volder AG
- Abstract
Using functional magnetic resonance imaging, here we monitored the brain activity in 12 early blind subjects and 12 blindfolded control subjects, matched for age, gender and musical experience, during a beat detection task. Subjects were required to discriminate regular ("beat") from irregular ("no beat") rhythmic sequences composed of sounds or vibrotactile stimulations. In both sensory modalities, the brain activity differences between the two groups involved heteromodal brain regions including parietal and frontal cortical areas and occipital brain areas, that were recruited in the early blind group only. Accordingly, early blindness induced brain plasticity changes in the cerebral pathways involved in rhythm perception, with a participation of the visually deprived occipital brain areas whatever the sensory modality for input. We conclude that the visually deprived cortex switches its input modality from vision to audition and vibrotactile sense to perform this temporal processing task, supporting the concept of a metamodal, multisensory organization of this cortex.
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- 2021
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42. Motor Skill Training May Restore Impaired Corticospinal Tract Fibers in Children With Cerebral Palsy.
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Bleyenheuft Y, Dricot L, Ebner-Karestinos D, Paradis J, Saussez G, Renders A, De Volder A, Araneda R, Gordon AM, and Friel KM
- Subjects
- Adolescent, Cerebral Palsy complications, Cerebral Palsy pathology, Cerebral Palsy physiopathology, Child, Diffusion Tensor Imaging, Female, Humans, Lower Extremity physiopathology, Male, Outcome and Process Assessment, Health Care, Postural Balance physiology, Arm physiopathology, Cerebral Palsy rehabilitation, Motor Skills physiology, Nerve Fibers pathology, Nerve Fibers physiology, Neurological Rehabilitation methods, Practice, Psychological, Pyramidal Tracts diagnostic imaging, Pyramidal Tracts pathology, Pyramidal Tracts physiopathology
- Abstract
Background . In children with unilateral cerebral palsy (UCP), the fibers of the corticospinal tract (CST) emerging from the lesioned hemisphere are damaged following the initial brain injury. The extent to which the integrity of these fibers is restorable with training is unknown. Objective . To assess changes in CST integrity in children with UCP following Hand-and-Arm-Bimanual-Intensive-Therapy-Including-Lower-Extremity (HABIT-ILE) compared to a control group. Methods . Forty-four children with UCP participated in this study. Integrity of the CSTs was measured using diffusion tensor imaging before and after 2 weeks of HABIT-ILE (treatment group, n = 23) or 2 weeks apart without intensive treatment (control group, n = 18). Fractional anisotropy (FA) and mean diffusivity (MD) were the endpoints for assessing the integrity of CST. Results . As highlighted in our whole tract analysis, the FA of the CST originating from the nonlesioned and lesioned hemispheres increased significantly after therapy in the treatment group compared to the control group (group * test session interaction: P < .001 and P = .049, respectively). A decrease in MD was also observed in the CST emerging from the nonlesioned and lesioned hemispheres (group * time interaction: both P < .001). In addition, changes in manual ability correlated with changes in FA in both CSTs ( r = 0.463, P = .024; r = 0.643, P < .001) and changes in MD in CST emerging from nonlesioned hemisphere ( r = -0.662, P < .001). Conclusions . HABIT-ILE improves FA/MD in the CST and hand function of children with UCP, suggesting that CST fibers retain a capacity for functional restoration. This finding supports the application of intensive motor skill training in clinical practice for the benefit of numerous patients.
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- 2020
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43. Functional, neuroplastic and biomechanical changes induced by early Hand-Arm Bimanual Intensive Therapy Including Lower Extremities (e-HABIT-ILE) in pre-school children with unilateral cerebral palsy: study protocol of a randomized control trial.
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Araneda R, Sizonenko SV, Newman CJ, Dinomais M, Le Gal G, Nowak E, Guzzetta A, Riquelme I, Brochard S, and Bleyenheuft Y
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- Child, Preschool, Humans, Infant, Disability Evaluation, Hand physiopathology, Lower Extremity physiopathology, Motor Skills physiology, Neuronal Plasticity, Secondary Prevention, Surveys and Questionnaires, Upper Extremity physiopathology, Multicenter Studies as Topic, Randomized Controlled Trials as Topic, Cerebral Palsy physiopathology, Cerebral Palsy therapy, Physical Therapy Modalities
- Abstract
Background: Cerebral palsy (CP) causes motor, cognitive and sensory impairment at different extents. Many recent rehabilitation developments (therapies) have focused solely on the upper extremities (UE), although the lower extremities (LE) are commonly affected. Hand-arm Bimanual Intensive Therapy Including Lower Extremities (HABIT-ILE) applies the concepts of motor skill learning and intensive training to both the UE and LE. It involves constant stimulation of the UE and LE, for several hours each day over a 2-week period. The effects of HABIT-ILE have never been evaluated in a large sample of young children. Furthermore, understanding of functional, neuroplastic and biomechanical changes in infants with CP is lacking. The aim of this study is to carry out a multi-center randomized controlled trial (RCT) to evaluate the effects of HABIT-ILE in pre-school children with unilateral CP on functional, neuroplastic and biomechanical parameters., Methods: This multi-center, 3-country study will include 50 pre-school children with CP aged 1-4 years. The RCT will compare the effect of 50 h (two weeks) of HABIT-ILE versus usual motor activity, including regular rehabilitation. HABIT-ILE will be delivered in a day-camp setting, with structured activities and functional tasks that will be continuously progressed in terms of difficulty. Assessments will be performed at 3 intervals: baseline (T0), two weeks later and 3 months later. Primary outcomes will be the Assisting Hand Assessment; secondary outcomes include the Melbourne Assessment-2, executive function assessments, questionnaires ACTIVLIM-CP, Pediatric Evaluation of Disability Inventory, Young Children's Participation and Environment Measure, Measure of the Process of Care, Canadian Occupational Performance Measure, as well as neuroimaging and kinematics measures., Discussion: We expect that HABIT-ILE will induce functional, neuroplastic and biomechanical changes as a result of the intense, activity-based rehabilitation process and these changes will impact the whole developmental curve of each child, improving functional ability, activity and participation in the short-, mid- and long-term. Name of the registry: Changes Induced by Early HABIT-ILE in Pre-school Children With Uni- and Bilateral Cerebral Palsy (EarlyHABIT-ILE)., Trial Registration: Trial registration number: NCT04020354-Registration date on the International Clinical Trials Registry Platform (ICTRP): November 20th, 2018; Registration date on NIH Clinical Trials Registry: July 16th, 2019.
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- 2020
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44. Reliability and responsiveness of the Jebsen-Taylor Test of Hand Function and the Box and Block Test for children with cerebral palsy.
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Araneda R, Ebner-Karestinos D, Paradis J, Saussez G, Friel KM, Gordon AM, and Bleyenheuft Y
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- Adolescent, Child, Disability Evaluation, Female, Humans, Male, Motor Activity, Reproducibility of Results, Retrospective Studies, Treatment Outcome, Upper Extremity, Cerebral Palsy diagnosis, Cerebral Palsy rehabilitation, Neuropsychological Tests standards
- Abstract
Aim: To assess the reliability and to evaluate the responsiveness of both the Jebsen-Taylor Test of Hand Function (JTTHF) and the Box and Block Test (BBT) in children with cerebral palsy (CP)., Method: In this retrospective study, the reliability analyses were conducted with paired t-tests considering a short (mean 14d) and a long (mean 120d) time in between two assessment periods. In addition, an intraclass correlation coefficient (ICC) was used to assess the level of congruency. The responsiveness to therapy was conducted with a paired t-test in the whole sample regarding the age, the manual ability level as classified with the Manual Ability Classification System (MACS), and the topography., Results: Our main results confirmed the tests' reliability in a short time period for the JTTHF in both hands and for the BBT on the less affected hand. These results were consistent with the ICC. The responsiveness was confirmed, except on the less affected hand for the JTTHF, with similar results for age, MACS, and topography approach., Interpretation: This study supports the use of the JTTHF and the BBT to examine changes after short-term interventions for children with CP. These results should be interpreted with association to normative values or with a control group when used over long assessment periods., What This Paper Adds: The Box and Block Test (BBT) is reliable in a brief period of assessment in children with cerebral palsy (CP). The Jebsen-Taylor Test of Hand Function (JTTHF) is reliable in a brief period of assessment in children with CP. The JTTHF and BBT are responsive to changes in a brief period of intensive therapy in children with CP. The reliability and responsiveness of the JTTHF and BBT are weak over long assessment periods., (© 2019 Mac Keith Press.)
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- 2019
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45. Interrater Reliability of Activity Questionnaires After an Intensive Motor-Skill Learning Intervention for Children With Cerebral Palsy.
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Paradis J, Dispa D, De Montpellier A, Ebner-Karestinos D, Araneda R, Saussez G, Renders A, Arnould C, and Bleyenheuft Y
- Subjects
- Adolescent, Cerebral Palsy physiopathology, Child, Child, Preschool, Double-Blind Method, Humans, Male, Observer Variation, Patient Satisfaction, Reproducibility of Results, Treatment Outcome, Cerebral Palsy rehabilitation, Motor Skills, Parents, Surveys and Questionnaires
- Abstract
Objective: To investigate the reliability of parents-reported activity questionnaires after a motor-skill learning intervention for children with cerebral palsy (CP). We hypothesize that the intervention process might influence parental judgment., Design: Double-blind randomized trial., Setting: Conventional therapy was delivered in the usual context while intensive intervention was provided at the Catholic University of Louvain., Participants: Children with CP (N=41; age range 5-18y, Gross Motor Function Classification System I-IV) were randomized to a control group (CG) (n=21, 2 dropouts) receiving conventional therapy or an intervention group (IG) (n=20) receiving hand-arm bimanual intensive therapy-including lower extremities (HABIT-ILE)., Interventions: Conventional therapy (mostly neurodevelopmental) was delivered as ongoing treatment (1-5 times/wk). HABIT-ILE, based on motor-skill learning, was delivered over 2 weeks. All children were assessed at T1 (baseline), T2 (3wk after baseline) and T3 (4mo after baseline)., Main Outcomes Measures: ABILHAND-Kids and ACTIVLIM-CP questionnaires rated by parents (perception) and 2 examiners (videotapes)., Results: Agreement (level/range) between examiners was systematically almost perfect (P≤.001). At baseline, moderate to almost perfect agreement (level/range) was observed between parents and examiners (P≤.001). At T2 and T3, a similar agreement (level/range) was observed for the CG. For the IG, a similar level of agreement was observed, but the range of agreement varied from poor to almost perfect (P≤.001), with parents estimating higher performance measures compared to examiners after intervention. Higher performance was associated with higher satisfaction scores of the child's functional goals at T3., Conclusion: Parents and examiners have a similar perception of the child's performance at baseline and during conventional therapy. Their perceptions are less congruent after a motor-skill learning intervention, probably due to the goal-oriented process of the intervention. Therefore, our results favor the use of blind observations of home-videotaped items after intensive motor-skill learning interventions., (Copyright © 2019 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.)
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- 2019
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46. Impairments of Visuospatial Attention in Children with Unilateral Spastic Cerebral Palsy.
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Ickx G, Hatem SM, Riquelme I, Friel KM, Henne C, Araneda R, Gordon AM, and Bleyenheuft Y
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- Adolescent, Cerebral Palsy psychology, Child, Child, Preschool, Female, Functional Laterality physiology, Humans, Male, Proprioception physiology, Psychomotor Performance physiology, Attention physiology, Cerebral Palsy complications, Perceptual Disorders complications, Space Perception physiology, Visual Perception physiology
- Abstract
Aim: This observational study aimed at assessing the prevalence of visuospatial attention deficits in children with unilateral spastic cerebral palsy (USCP), taking into consideration the affected hemibody and the localization of the brain lesion., Method: Seventy-five children with USCP were assessed with four visuospatial attention tests: star cancellation, Ogden figure copy, line bisection, and proprioceptive pointing., Results: A majority (64%) of children with USCP presented a deficit in at least one test compared to the reference values. The alterations observed in children with left or right USCP were related to egocentric or allocentric neglect, respectively. Children with cortico/subcortical lesion presented more often visuospatial attention deficits than children with periventricular lesion. Visuospatial attention deficits were not associated with brain lesion locations., Interpretation: Visuospatial attention deficits are prevalent in children with USCP and should be taken into account during their rehabilitation process. The present results shed new light on the interpretation of motor impairments in children with USCP as they may be influenced by the frequent presence of visuospatial deficits.
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- 2018
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47. A key role of the prefrontal cortex in the maintenance of chronic tinnitus: An fMRI study using a Stroop task.
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Araneda R, Renier L, Dricot L, Decat M, Ebner-Karestinos D, Deggouj N, and De Volder AG
- Subjects
- Adult, Brain Mapping, Female, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Recognition, Psychology, Stroop Test, Young Adult, Executive Function physiology, Prefrontal Cortex physiopathology, Tinnitus physiopathology, Tinnitus psychology
- Abstract
Introduction: Since we recently showed in behavioural tasks that the top-down cognitive control was specifically altered in tinnitus sufferers, here we wanted to establish the link between this impaired executive function and brain alterations in the frontal cortex in tinnitus patients., Method: Using functional magnetic resonance imaging (fMRI), we monitored the brain activity changes in sixteen tinnitus patients (TP) and their control subjects (CS) while they were performing a spatial Stroop task, both in audition and vision., Results: We observed that TP differed from CS in their functional recruitment of the dorsolateral prefrontal cortex (dlPFC, BA46), the cingulate gyrus and the ventromedial prefrontal cortex (vmPFC, BA10). This recruitment was higher during interference conditions in tinnitus participants than in controls, whatever the sensory modality. Furthermore, the brain activity level in the right dlPFC and vmPFC correlated with the performance in the Stroop task in TP., Conclusion: Due to the direct link between poor executive functions and prefrontal cortex alterations in TP, we postulate that a lack of inhibitory modulation following an impaired top-down cognitive control may maintain tinnitus by hampering habituation mechanisms. This deficit in executive functions caused by prefrontal cortex alterations would be a key-factor in the generation and persistence of tinnitus.
- Published
- 2017
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48. Hearing, feeling or seeing a beat recruits a supramodal network in the auditory dorsal stream.
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Araneda R, Renier L, Ebner-Karestinos D, Dricot L, and De Volder AG
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- Adult, Humans, Auditory Perception, Putamen physiology, Touch Perception, Visual Perception
- Abstract
Hearing a beat recruits a wide neural network that involves the auditory cortex and motor planning regions. Perceiving a beat can potentially be achieved via vision or even touch, but it is currently not clear whether a common neural network underlies beat processing. Here, we used functional magnetic resonance imaging (fMRI) to test to what extent the neural network involved in beat processing is supramodal, that is, is the same in the different sensory modalities. Brain activity changes in 27 healthy volunteers were monitored while they were attending to the same rhythmic sequences (with and without a beat) in audition, vision and the vibrotactile modality. We found a common neural network for beat detection in the three modalities that involved parts of the auditory dorsal pathway. Within this network, only the putamen and the supplementary motor area (SMA) showed specificity to the beat, while the brain activity in the putamen covariated with the beat detection speed. These results highlighted the implication of the auditory dorsal stream in beat detection, confirmed the important role played by the putamen in beat detection and indicated that the neural network for beat detection is mostly supramodal. This constitutes a new example of convergence of the same functional attributes into one centralized representation in the brain., (© 2016 Federation of European Neuroscience Societies and John Wiley & Sons Ltd.)
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- 2017
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49. Cortical Plasticity and Olfactory Function in Early Blindness.
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Araneda R, Renier LA, Rombaux P, Cuevas I, and De Volder AG
- Abstract
Over the last decade, functional brain imaging has provided insight to the maturation processes and has helped elucidate the pathophysiological mechanisms involved in brain plasticity in the absence of vision. In case of congenital blindness, drastic changes occur within the deafferented "visual" cortex that starts receiving and processing non visual inputs, including olfactory stimuli. This functional reorganization of the occipital cortex gives rise to compensatory perceptual and cognitive mechanisms that help blind persons achieve perceptual tasks, leading to superior olfactory abilities in these subjects. This view receives support from psychophysical testing, volumetric measurements and functional brain imaging studies in humans, which are presented here.
- Published
- 2016
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50. Altered inhibitory control and increased sensitivity to cross-modal interference in tinnitus during auditory and visual tasks.
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Araneda R, De Volder AG, Deggouj N, and Renier L
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- Acoustic Stimulation, Adult, Aged, Case-Control Studies, Female, Humans, Male, Middle Aged, Young Adult, Auditory Perception physiology, Brain physiology, Tinnitus physiopathology, Visual Perception physiology
- Abstract
Tinnitus is the perception of sound in the absence of external stimulus. Currently, the pathophysiology of tinnitus is not fully understood, but recent studies indicate that alterations in the brain involve non-auditory areas, including the prefrontal cortex. In experiment 1, we used a go/no-go paradigm to evaluate the target detection speed and the inhibitory control in tinnitus participants (TP) and control subjects (CS), both in unimodal and bimodal conditions in the auditory and visual modalities. We also tested whether the sound frequency used for target and distractors affected the performance. We observed that TP were slower and made more false alarms than CS in all unimodal auditory conditions. TP were also slower than CS in the bimodal conditions. In addition, when comparing the response times in bimodal and auditory unimodal conditions, the expected gain in bimodal conditions was present in CS, but not in TP when tinnitus-matched frequency sounds were used as targets. In experiment 2, we tested the sensitivity to cross-modal interference in TP during auditory and visual go/no-go tasks where each stimulus was preceded by an irrelevant pre-stimulus in the untested modality (e.g. high frequency auditory pre-stimulus in visual no/no-go condition). We observed that TP had longer response times than CS and made more false alarms in all conditions. In addition, the highest false alarm rate occurred in TP when tinnitus-matched/high frequency sounds were used as pre-stimulus. We conclude that the inhibitory control is altered in TP and that TP are abnormally sensitive to cross-modal interference, reflecting difficulties to ignore irrelevant stimuli. The fact that the strongest interference effect was caused by tinnitus-like auditory stimulation is consistent with the hypothesis according to which such stimulations generate emotional responses that affect cognitive processing in TP. We postulate that executive functions deficits play a key-role in the perception and maintenance of tinnitus.
- Published
- 2015
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