38 results on '"Hernández-Pérez R"'
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2. Allan deviation analysis of financial return series
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Hernández-Pérez, R.
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- 2012
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3. El cuestionario para el Diagnóstico enfermero psico-social, CdePS. Qué es y cómo se utiliza.
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Brito Brito PR, Rodríguez Álvaro M, García Hernández AM, Hernández Pérez R, Sicilia Sosvilla I, Aguirre-Jaime A, and Grupo CdePS
- Subjects
Diagnóstico enfermero ,Cuestionario ,Psicosocial ,Atención Primaria ,Validez: Fiabilidad ,Nursing diagnosis ,Questionnaire ,Psychosocial ,Primary Care ,Validity ,Reliability ,Nursing ,RT1-120 - Abstract
Resumen: En este artículo se presenta el CdePS, un cuestionario construido y validado para facilitar el enunciado del diagnóstico enfermero psicosocial en Atención Primaria. Consta de un total de preguntas que oscila entre 36 y 61, dependiendo de las respuestas dadas por el paciente. Los resultados asignan hasta 28 etiquetas diagnósticas psicosociales. La introducción de los lenguajes estandarizados de cuidados en las historias de salud informatizadas ha conllevado una utilización masiva de la terminología NANDA no exenta de problemas en su empleo. Por ello, disponer de un instrumento válido, fiable y de fácil manejo permite adecuar la determinación diagnóstica final. El CdePS cumple con las recomendaciones propuestas para la investigación en nomenclatura diagnóstica enfermera superando las pruebas pertinentes de validez y fiabilidad. Se configura como una herramienta centrada en la perspectiva del paciente al recoger su propia valoración de la situación actual. Sabiendo que las necesidades y percepciones de los pacientes aparecen como elementos primordiales en los nuevos modelos de atención sanitaria, el CdePS, al evaluar la dimensión psicosocial, podría resultar beneficioso para mejorar el conocimiento sobre el impacto de la enfermedad, facilitar su control y manejo clínico, describir el estado de salud global y beneficiar la comunicación entre profesionales y pacientes. Summary: This article presents the CdePS, a constructed and validated questionnaire to facilitate the statement of psychosocial nursing diagnosis in primary care. It comprises a total of questions that ranged from 36 to 61, depending on the answers given by the patient. The results assign up to 28 psychosocial diagnostic labels. The introduction of standardized language for care in the computerized health records has led to a massive use of NANDA terminology not without problems at work. So experts have proposed to construct a valid, reliable and easy to use instrument for nursing diagnosis determination. The CdePS complies with the proposed recommendations for research in nursing diagnostic nomenclature relevant evidence overcoming validity and reliability. It is designed as a tool focused on the perspective of the patient to collect their own assessment of the current situation. Knowing the needs and perceptions of patients appear as key elements in the new models of health care. CdePS, in assessing the psychosocial dimension, could be beneficial to improve knowledge on the impact of the disease, to facilitate monitoring and clinical management, describe the overall health status and benefit communication between professionals and patients.
- Published
- 2012
4. An analogy of the size distribution of business firms with Bose–Einstein statistics
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Hernández-Pérez, R.
- Published
- 2010
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5. Pattern synchrony in electrical signals related to earthquake activity
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Hernández-Pérez, R., Guzmán-Vargas, L., Ramírez-Rojas, A., and Angulo-Brown, F.
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- 2010
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6. Correlations and variability in electrical signals related to earthquake activity
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Guzmán-Vargas, L., Ramírez-Rojas, A., Hernández-Pérez, R., and Angulo-Brown, F.
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- 2009
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7. Complete state counting for Gentile's generalization of the Pauli exclusion principle
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Hernández-Pérez, R. and Tun, Dionisio
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- 2007
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8. Scaling Differences of Heartbeat Excursions Between Wake and Sleep Periods
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Guzmán-Vargas, L., primary, Reyes-Ramírez, I., additional, Hernández-Pérez, R., additional, and Angulo-Brown, F., additional
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- 2011
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9. Small-world topology and memory effects on decision time in opinion dynamics
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Guzmán-Vargas, L. and Hernández-Pérez, R.
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- 2006
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10. Company size distribution for developing countries
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Hernández-Pérez, R., Angulo-Brown, F., and Tun, Dionisio
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- 2006
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11. Effectiveness of nursing intervention for adult patients experiencing chronic pain: a systematic review
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Castillo-Bueno, M D, Moreno-Pina, J P, Martínez-Puente, M V, Artiles-Suárez, M M, Company-Sancho, M C, García-Andrés, M C, Sánchez-Villar, I, and Hernández-Pérez, R
- Published
- 2010
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12. Análisis de la gestión de casos de enfermería comunitaria de enlace de Tenerife desde la perspectiva del uso de la taxonomía NANDA-NOC-NIC: consenso de expertos
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Hernández Delgado, C.R., primary, Hernández Pérez, R., additional, Rojas González, Y., additional, Montesinos Sánchez, N., additional, Parrilla Suárez, I., additional, García Cabrera, C.L., additional, and Catilla Martínez, A.V., additional
- Published
- 2018
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13. PHYTOTOXIC POTENTIAL OF Ipomoea batatas EXTRACT , DETECTED THROUGH A NEW TYPE OF SANDWICH MICROBIOASSAY ON THREE SPECIES OF WEEDS
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HERNÁNDEZ-ARO, M., primary, HERNÁNDEZ-PÉREZ, R., additional, GUADALUPE-TAPIA, G., additional, GUILLEN-SÁNCHEZ, D., additional, and CASTELLANOS-GONZÁLEZ, L., additional
- Published
- 2017
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14. Allelopathic Influence of Residues from Sphagneticola trilobata on Weeds and Crops
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HERNÁNDEZ-ARO, M., primary, HERNÁNDEZ-PÉREZ, R., additional, GUILLÉN-SÁNCHEZ, D., additional, and TORRES-GARCIA, S., additional
- Published
- 2016
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15. Proposal for the responsible management of higher education
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Hernández-Pérez, R. D. (Rubén Darío) and Acevedo-Granados, C. A. (César Augusto)
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ACCESS TO EDUCATION ,EDUCACIÓN SUPERIOR ,SOCIAL RESPONSIBILITY ,INFRAESTRUCTURA Y GESTIÓN DEL TERRITORIO ,INFRAESTRUCTURE AND LAND PLANNING ,RESPONSABILIDAD SOCIAL ,RSO00074 ,CALIDAD DE LA ENSEÑANZA ,TEACHING QUALITY ,HIGH EDUCATION ,ACCESO A LA EDUCACIÓN - Abstract
Con el fin de compartir un lenguaje mínimo de entendimiento se realiza una introducción a los conceptos de calidad, gestión responsable y responsabilidad social. Luego, con base en la premisa de que la inversión en educación es el mejor negocio que puede hacer un país, y al considerar que la ley 30 de 1992 ya cumplió con las expectativas de una época, aspectos en los cuales se encuentra coincidencia con la justificación de la propuesta de reforma a la educación, se tratan algunos aspectos que vale la pena tener en cuenta sobre la actual propuesta del gobierno del presidente Juan Manuel Santos quien ha puesto a consideración una nueva ley con el fin de mejorar las condiciones de cobertura y calidad que permitan a los jóvenes colombianos ser competitivos mundialmente y aportar al desarrollo del país de una manera tangible. Los diferentes representantes del sistema educativo colombiano, y en particular de la educación superior, coinciden en aceptar que se requiere un cambio en la Ley 30 que permita transformar la realidad de los últimos 18 años, esto da pie a algunas preguntas y sugerencias a partir del proyecto de reforma que se encuentra disponible para la discusión nacional y para lo cual se propone una intervención que impulse la sostenibilidad de los objetivos expresados en más y mejores estudiantes, jóvenes colombianos, haciendo parte de la educación superior colombiana para enfrentar un mundo cambiante y sin fronteras. Lo anterior se resume en las preguntas: ¿El proyecto planteado incorpora las acciones necesarias y suficientes para lograr la transformación de los resultados de la Educación superior? y ¿Se tiene conciencia del efecto en la sociedad colombiana? Para responder a tales inquietudes, en este trabajo se proponen algunas acciones complementarias que se considera propiciarían la gestión responsable de la educación superior. In order to share a minimum language of understanding is an introduction to the concepts of quality, accountability and social responsibility. Then, based on the premise that investing in education is the best deal you can do a country, and to consider that Law 30 of 1992 already complied with the expectations of an era, aspects which are coinciding with the justification of the proposed reform to education, are dealt with some aspects that are worth taking into account on the current proposal of the Government of President Juan Manuel Santos who has consideration made a new law in order to improve coverage and quality to allow Colombian young people become competitive globally and contribute to the development of the country in a tangible way. Various representatives of the Colombian educational system, and in particular higher education, agree in accepting that requires a change in the law 30 to transform the reality of the past 18 years, this gives rise to some questions and suggestions from the reform project that is available for the national discussion and which proposes an intervention to boost the sustainability of the aims expressed in more and better students, young Colombians, making part of the higher education in Colombia to confront a changing world and without borders. This is summarized in the questions: do raised project incorporates the actions necessary and sufficient to achieve the transformation of the results of higher education? responsible management of higher education and it is aware of the effect in Colombian society? To respond, this paper proposed certain complementary actions is considered would lead to the responsible management of the higher education.
- Published
- 2011
16. Evaluating the transport in small-world and scale-free networks
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Juárez-López, R., primary, Obregón-Quintana, B., additional, Hernández-Pérez, R., additional, Reyes-Ramírez, I., additional, and Guzmán-Vargas, L., additional
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- 2014
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17. Usefulness of 18F-FDG PET-CT in the Presurgical Assessment of Malignant Pleural Mesothelioma Treated with Neoadjuvant Chemotherapy
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Orcajo Rincón, J., Alonso Farto, J.C., Rotger Regi, A., Hernández Pérez, R., Hualde, A.M., and Pérez Aradas, V.
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- 2011
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18. Currículos estructurados en la lógica y el método de la ingeniería
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Hernández-Pérez, R. D. (Rubén Darío) and Ospina, L. V. (Lucía Victoria)
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CULTURE AND LIBRARY ,FORMACIÓN INTEGRAL ,REI00028 ,MALLA CURRICULAR ,MODEL OF PROFESSIONAL ,CULTURA Y BIBLIOTECA ,CURRICULAR DISCIPLINES ,CIVIL ENGINEERING - EDUCATION ,CURRICULUM NETWORK ,INGENIERÍA CIVIL - EDUCACIÓN ,MODELO DE PROFESIONAL ,INTEGRAL EDUCATION ,DISCIPLINAS CURRICULARES - Abstract
En una sociedad sujeta a la incertidumbre y a la dinámica del cambio permanente, se precisa de un proceso de formación integral de seres humanos y profesionales que les permita resolver con independencia y creatividad los problemas más generales y frecuentes de su profesión y participar activamente en el desarrollo económico y social del país. Para lograrlo, la Escuela de Ingeniería de Antioquia (EIA) ha asumido el reto de perfeccionar los currículos de sus programas académicos con criterios de pertinencia, calidad académica y racionalidad, tanto en la duración como en las actividades pedagógicas, complementadas con el autoaprendizaje, de acuerdo con las tendencias nacionales e internacionales y coherentes con las políticas gubernamentales y el proyecto institucional. En este artículo se presenta la propuesta curricular del programa de ingeniería civil, su estructura disciplinar mínima esencial, así como su articulación lógica, regidas por objetivos y diseñadas en correspondencia con la aplicación del método de la ingeniería. In a society subjected to the uncertainty and the dynamics of permanent change, it is necessary to have an integral educational process for the students: both as professionals and human beings. This will allow students to solve with independency and creativity the most general and frequent problems of their profession, as well as to participate actively in the economical and social development of their country. To achieve this, the Antioquia School of Engineering (Escuela de Ingeniería de Antioquia) has assumed the challenge of enhancing their academic programs curricula with criteria such as pertinence, academic quality, and rationality. Those criteria take into account national and international tendencies for pedagogical activities, duration, and special emphasis in self-learning. This article shows the proposed curriculum for the Civil Engineering program, its minimal and essential disciplinary structure, as its logical articulation, guided by objectives and designed in correspondence with the application of the Engineering method.
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- 2004
19. DIFFERENCES IN THE STABILITY OF THE HEART INTERBEAT RATE DURING WAKE AND SLEEP PERIODS
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HERNÁNDEZ-PÉREZ, R., primary, GUZMÁN-VARGAS, L., additional, REYES-RAMÍREZ, I., additional, and ANGULO-BROWN, F., additional
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- 2011
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20. Utilidad de la PET-TAC 18F-FDG en la valoración prequirúrgica del mesotelioma pleural maligno tras quimioterapia neoadyuvante
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Orcajo Rincón, J., primary, Alonso Farto, J.C., additional, Rotger Regi, A., additional, Hernández Pérez, R., additional, Hualde, A.M., additional, and Pérez Aradas, V., additional
- Published
- 2011
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21. Evolution in time and scales of the stability of heart interbeat rate
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Hernández-Pérez, R., primary, Guzmán-Vargas, L., additional, Reyes-Ramírez, I., additional, and Angulo-Brown, F., additional
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- 2010
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22. Effectiveness of nursing intervention for adult patients experiencing chronic pain: a systematic review
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Castillo-Bueno, M D, primary, Moreno-Pina, J P, additional, Martínez-Puente, M V, additional, Artiles-Suárez, M M, additional, Company-Sancho, M C, additional, García-Andrés, M C, additional, Sánchez-Villar, I, additional, and Hernández-Pérez, R, additional
- Published
- 2010
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23. Alteraciones gammagráficas en las enfermedades metabólicas óseas
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Alonso Farto, J.C., primary, Orcajo Rincón, J., additional, Zamudio Rodríguez, D., additional, and Hernández Pérez, R., additional
- Published
- 2009
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24. Neural evidence for referential understanding of object words in dogs.
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Boros M, Magyari L, Morvai B, Hernández-Pérez R, Dror S, and Andics A
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- Animals, Dogs physiology, Male, Female, Comprehension physiology, Electroencephalography, Humans, Semantics, Evoked Potentials physiology
- Abstract
Using words to refer to objects in the environment is a core feature of the human language faculty. Referential understanding assumes the formation of mental representations of these words.
1 , 2 Such understanding of object words has not yet been demonstrated as a general capacity in any non-human species,3 despite multiple behavior-based case reports.4 , 5 , 6 , 7 , 8 , 9 , 10 In human event-related potential (ERP) studies, object word knowledge is typically tested using the semantic violation paradigm, where words are presented either with their referent (match) or another object (mismatch).11 , 12 Such mismatch elicits an N400 effect, a well-established neural correlate of semantic processing.12 , 13 Reports of preverbal infant N400 evoked by semantic violations14 assert the use of this paradigm to probe mental representations of object words in nonverbal populations. Here, measuring dogs' (Canis familiaris) ERPs to objects primed with matching or mismatching object words, we found a mismatch effect at a frontal electrode, with a latency (206-606 ms) comparable to the human N400. A greater difference for words that dogs knew better, according to owner reports, further supported a semantic interpretation of this effect. Semantic expectations emerged irrespective of vocabulary size, demonstrating the prevalence of referential understanding in dogs. These results provide the first neural evidence for object word knowledge in a non-human animal. VIDEO ABSTRACT., Competing Interests: Declaration of interests The authors declare no competing interests., (Copyright © 2024 Elsevier Inc. All rights reserved.)- Published
- 2024
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25. Representation of rewards differing in their hedonic valence in the caudate nucleus correlates with the performance in a problem-solving task in dogs (Canis familiaris).
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Cuaya LV, Hernández-Pérez R, Andics A, Báji R, Gácsi M, Guilloux M, Roche A, Callejon L, Miklósi Á, and Ujfalussy DJ
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- Dogs, Animals, Brain, Learning, Reward, Caudate Nucleus diagnostic imaging, Problem Solving
- Abstract
We have investigated dogs' (Canis familiaris) abilities in associating different sounds with appetitive stimuli of different incentive values. The association's establishment was first tested on family dogs (n = 20) in a problem-solving behavioural paradigm (experiment 1), then in a problem-solving behavioural paradigm as well as an fMRI study on specially trained family dogs (n = 20) (experiment 2). The aim was to show behavioural and parallel neural effects of the association formed between the two sounds and two different associated appetitive stimuli. The latency of solving the problem was considered an indicator of the motivational state. In our first experiment, where only behaviour was studied, we found that dogs were quicker in solving a problem upon hearing the sound associated with food higher in reward value, suggesting that they have successfully associated the sounds with the corresponding food value. In our second experiment, this behaviour difference was not significant. In the fMRI study, the cerebral response to the two sounds was compared both before and after the associative training. Two bilateral regions of interest were explored: the caudate nucleus and the amygdala. After the associative training, the response in the caudate nucleus was higher to the sound related to a higher reward value food than to the sound related to a lower reward value food, which difference was not present before the associative training. We found an increase in the amygdala response to both sounds after the training. In a whole-brain representational similarity analysis, we found that cerebral patterns in the caudate nucleus to the two sounds were different only after the training. Moreover, we found a positive correlation between the dissimilarity index in the caudate nucleus for activation responses to the two sounds and the difference in latencies (i.e. high reward value associated sound condition latency-low reward value associated sound condition latency) to solve the behavioural task: the bigger the difference between the conditions in latency to solve the task, the greater the difference in the neural representation of the two sounds was. In summary, family dogs' brain activation patterns reflected their expectations based on what they learned about the relationship between two sounds and their associated appetitive stimuli., (© 2023. Springer Nature Limited.)
- Published
- 2023
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26. Speech naturalness detection and language representation in the dog brain.
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Cuaya LV, Hernández-Pérez R, Boros M, Deme A, and Andics A
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- Adult, Animals, Dogs, Female, Humans, Male, Auditory Perception physiology, Language, Magnetic Resonance Imaging methods, Speech Perception physiology
- Abstract
Family dogs are exposed to a continuous flow of human speech throughout their lives. However, the extent of their abilities in speech perception is unknown. Here, we used functional magnetic resonance imaging (fMRI) to test speech detection and language representation in the dog brain. Dogs (n = 18) listened to natural speech and scrambled speech in a familiar and an unfamiliar language. Speech scrambling distorts auditory regularities specific to speech and to a given language, but keeps spectral voice cues intact. We hypothesized that if dogs can extract auditory regularities of speech, and of a familiar language, then there will be distinct patterns of brain activity for natural speech vs. scrambled speech, and also for familiar vs. unfamiliar language. Using multivoxel pattern analysis (MVPA) we found that bilateral auditory cortical regions represented natural speech and scrambled speech differently; with a better classifier performance in longer-headed dogs in a right auditory region. This neural capacity for speech detection was not based on preferential processing for speech but rather on sensitivity to sound naturalness. Furthermore, in case of natural speech, distinct activity patterns were found for the two languages in the secondary auditory cortex and in the precruciate gyrus; with a greater difference in responses to the familiar and unfamiliar languages in older dogs, indicating a role for the amount of language exposure. No regions represented differently the scrambled versions of the two languages, suggesting that the activity difference between languages in natural speech reflected sensitivity to language-specific regularities rather than to spectral voice cues. These findings suggest that separate cortical regions support speech naturalness detection and language representation in the dog brain., (Copyright © 2021. Published by Elsevier Inc.)
- Published
- 2022
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27. Personality Traits Induce Different Brain Patterns When Processing Social and Valence Information.
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Hevia-Orozco JC, Reyes-Aguilar A, Hernández-Pérez R, González-Santos L, Pasaye EH, and Barrios FA
- Abstract
This paper shows the brain correlates of Cloninger's personality model during the presentation of social scenarios under positive or negative valence situations. Social scenarios were constructed when participants played the Dictator game with two confederates that had two opposites roles as the cooperator (Coop) and non-cooperator (NoCoop). Later the same day during a fMRI scanning session, participants read negative (Neg) and positive (Pos) situations that happened to confederates in the past. Participants were asked to think "how do you think those people felt during that situation?" A dissimilarity matrix between stimuli were obtained from fMRI results. Results shown that Harm Avoidance trait people make use of right middle frontal gyrus and left superior frontal gyrus to discriminate between Coop and NoCoop. Cooperation as a trait makes use of the right superior temporal gyrus and the right precuneus to discriminate between Coop and NoCoop in positive social scenarios. Finally, Self-directedness trait people make use of the right inferior parietal lobe to discriminate between Coop and NoCoop in negative social scenarios and the right precuneus to discriminate between Coop and Strangers. An intuitive link between discrimination findings and behavioral patterns of those personality traits is proposed., 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 Hevia-Orozco, Reyes-Aguilar, Hernández-Pérez, González-Santos, Pasaye and Barrios.)
- Published
- 2022
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28. Comparative Brain Imaging Reveals Analogous and Divergent Patterns of Species and Face Sensitivity in Humans and Dogs.
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Bunford N, Hernández-Pérez R, Farkas EB, Cuaya LV, Szabó D, Szabó ÁG, Gácsi M, Miklósi Á, and Andics A
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- Adult, Amygdala diagnostic imaging, Amygdala physiology, Animals, Brain Mapping, Cerebral Cortex diagnostic imaging, Cerebral Cortex physiology, Dogs, Female, Hippocampus diagnostic imaging, Hippocampus physiology, Humans, Individuality, Linear Models, Magnetic Resonance Imaging, Male, Middle Aged, Species Specificity, Visual Pathways physiology, Young Adult, Brain diagnostic imaging, Brain physiology, Facial Recognition physiology, Recognition, Psychology physiology
- Abstract
Conspecific-preference in social perception is evident for multiple sensory modalities and in many species. There is also a dedicated neural network for face processing in primates. However, the evolutionary origin and the relative role of neural species sensitivity and face sensitivity in visuo-social processing are largely unknown. In this comparative study, species sensitivity and face sensitivity to identical visual stimuli (videos of human and dog faces and occiputs) were examined using functional magnetic resonance imaging in dogs ( n = 20; 45% female) and humans ( n = 30; 50% female). In dogs, the bilateral mid suprasylvian gyrus showed conspecific-preference, no regions exhibited face-preference, and the majority of the visually-responsive cortex showed greater conspecific-preference than face-preference. In humans, conspecific-preferring regions (the right amygdala/hippocampus and the posterior superior temporal sulcus) also showed face-preference, and much of the visually-responsive cortex showed greater face-preference than conspecific-preference. Multivariate pattern analyses (MVPAs) identified species-sensitive regions in both species, but face-sensitive regions only in humans. Across-species representational similarity analyses (RSAs) revealed stronger correspondence between dog and human response patterns for distinguishing conspecific from heterospecific faces than other contrasts. Results unveil functional analogies in dog and human visuo-social processing of conspecificity but suggest that cortical specialization for face perception may not be ubiquitous across mammals. SIGNIFICANCE STATEMENT To explore the evolutionary origins of human face-preference and its relationship to conspecific-preference, we conducted the first comparative and noninvasive visual neuroimaging study of a non-primate and a primate species, dogs and humans. Conspecific-preferring brain regions were observed in both species, but face-preferring brain regions were observed only in humans. In dogs, an overwhelming majority of visually-responsive cortex exhibited greater conspecific-preference than face-preference, whereas in humans, much of the visually-responsive cortex showed greater face-preference than conspecific-preference. Together, these findings unveil functional analogies and differences in the organizing principles of visuo-social processing across two phylogenetically distant mammal species., (Copyright © 2020 Bunford, Hernández-Pérez et al.)
- Published
- 2020
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29. Integrating Somatosensory Information Over Time.
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Hernández-Pérez R, Rojas-Hortelano E, and de Lafuente V
- Subjects
- Humans, Somatosensory Cortex, Touch, Touch Perception
- Abstract
Our choices are often informed by temporally integrating streams of sensory information. This has been well demonstrated in the visual and auditory domains, but the integration of tactile information over time has been less studied. We designed an active touch task in which participants explored a spheroid-shaped object to determine its inclination with respect to the horizontal plane (inclined to the left or the right). In agreement with previous findings, our results show that more errors, and longer decision times, accompany difficult decisions (small inclination angles). To gain insight into the decision-making process, we used a time-controlled task in which the experimenter manipulated the time available for tactile exploration on a trial-by-trial basis. The behavioral results were fit with a bounded accumulation model and an independent sampling model that assumes no sensory accumulation. The results of model fits favor an accumulation-to-bound mechanism and suggest that participants integrate the first 600 ms of 1800 ms-long stimuli. This means that the somatosensory system benefits from longer streams of information, although it does not make use of all available evidence., (Copyright © 2020 IBRO. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2020
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30. Tactile object categories can be decoded from the parietal and lateral-occipital cortices.
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Hernández-Pérez R, Cuaya LV, Rojas-Hortelano E, Reyes-Aguilar A, Concha L, and de Lafuente V
- Subjects
- Adult, Afferent Pathways diagnostic imaging, Brain Mapping, Female, Functional Laterality, Hand innervation, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Occipital Lobe diagnostic imaging, Oxygen blood, Parietal Lobe diagnostic imaging, Afferent Pathways physiology, Occipital Lobe physiology, Parietal Lobe physiology, Touch physiology, Touch Perception physiology
- Abstract
The visual system classifies objects into categories, and distinct populations of neurons within the temporal lobe respond preferentially to objects of a given perceptual category. We can also classify the objects we recognize with the sense of touch, but less is known about the neuronal correlates underlying this cognitive function. To address this question, we performed a multivariate pattern analysis (MVPA) of functional magnetic resonance imagining (fMRI) activity to identify the cortical areas that can be used to decode the category of objects explored with the hand. We observed that tactile object category can be decoded from the activity patterns of somatosensory and parietal areas. Importantly, we found that categories can also be decoded from the lateral occipital complex (LOC), which is a multimodal region known to be related to the representation of object shape. Furthermore, a hyperalignment analysis showed that activity patterns are similar across subjects. Our results thus indicate that tactile object recognition generates category-specific patterns of activity in a multisensory area known to encode objects, and that these patterns have a similar functional organization across individuals., (Copyright © 2017 IBRO. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2017
- Full Text
- View/download PDF
31. Our Faces in the Dog's Brain: Functional Imaging Reveals Temporal Cortex Activation during Perception of Human Faces.
- Author
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Cuaya LV, Hernández-Pérez R, and Concha L
- Subjects
- Animals, Attention physiology, Brain Mapping methods, Cognition physiology, Cues, Dogs, Emotions physiology, Facial Expression, Female, Humans, Image Processing, Computer-Assisted methods, Magnetic Resonance Imaging methods, Male, Photic Stimulation methods, Visual Pathways physiology, Face physiology, Temporal Lobe physiology, Visual Perception physiology
- Abstract
Dogs have a rich social relationship with humans. One fundamental aspect of it is how dogs pay close attention to human faces in order to guide their behavior, for example, by recognizing their owner and his/her emotional state using visual cues. It is well known that humans have specific brain regions for the processing of other human faces, yet it is unclear how dogs' brains process human faces. For this reason, our study focuses on describing the brain correlates of perception of human faces in dogs using functional magnetic resonance imaging (fMRI). We trained seven domestic dogs to remain awake, still and unrestrained inside an MRI scanner. We used a visual stimulation paradigm with block design to compare activity elicited by human faces against everyday objects. Brain activity related to the perception of faces changed significantly in several brain regions, but mainly in the bilateral temporal cortex. The opposite contrast (i.e., everyday objects against human faces) showed no significant brain activity change. The temporal cortex is part of the ventral visual pathway, and our results are consistent with reports in other species like primates and sheep, that suggest a high degree of evolutionary conservation of this pathway for face processing. This study introduces the temporal cortex as candidate to process human faces, a pillar of social cognition in dogs.
- Published
- 2016
- Full Text
- View/download PDF
32. [Follow-up on an outbreak in Venezuela of soft-tissue infection due to Mycobacterium abscessus associated with Mesotherapy].
- Author
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Da Mata Jardín O, Hernández-Pérez R, Corrales H, Cardoso-Leao S, and de Waard JH
- Subjects
- Follow-Up Studies, Humans, Venezuela epidemiology, Disease Outbreaks, Mesotherapy adverse effects, Mycobacterium Infections epidemiology, Mycobacterium Infections etiology, Skin Diseases, Bacterial epidemiology, Skin Diseases, Bacterial etiology, Soft Tissue Infections epidemiology, Soft Tissue Infections etiology
- Abstract
Introduction: Skin and soft tissue infections caused by nontuberculous mycobacteria (NMT) are reported to be associated with injections, liposuction, plastic surgery, and acupuncture. Herein, we describe an outbreak of soft tissue infection due to NMT following mesotherapy, a cosmetic procedure involving injection of poorly defined mixtures alleged to reduce local adiposity., Methods: Patients with skin lesions and a history of mesotherapy treatment, who visited the dermatology department of the public hospital in Barinas, Venezuela, from November 2004 to February 2005 were interviewed. Clinical and environmental samples were taken for mycobacteria isolation., Results: The interviews revealed that 68 patients who had been treated for cosmetic purposes at the same clinic by the same therapist had received injections with the same product and were infected with NMT. Clinical specimens from 5 patients grew Mycobacterium abscessus. No mesotherapy solution was available for analysis but M. abscessus was isolated from an environmental sample in the clinic. PCR-based strain typing techniques (ERIC-PCR, BOXA1R and RAPD) showed that the patient's isolates were undistinguishable from each other but different from the environmental isolate., Conclusions: This outbreak was likely caused by a contaminated injectable mesotherapy product and not by mycobacteria from the clinic environment. We emphasize the importance of better microbiological control of these products. To our knowledge, this outbreak, which affected at least 68 patients, appears to be the largest ever associated with mesotherapy and described in the literature., (Copyright © 2009 Elsevier España, S.L. All rights reserved.)
- Published
- 2010
- Full Text
- View/download PDF
33. [Trichotillomania: three cases presentation and diagnosis tests review].
- Author
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Piquero-Casals J, La Rotta-Higuera E, Piquero-Casals V, Hernández-Pérez R, and Piquero-Martín J
- Subjects
- Adolescent, Alopecia Areata diagnosis, Child, Combined Modality Therapy, Diagnosis, Differential, Female, Fluoxetine therapeutic use, Humans, Psychotherapy, Sertraline therapeutic use, Trichotillomania pathology, Trichotillomania psychology, Trichotillomania therapy, Trichotillomania diagnosis
- Abstract
Trichotillomania represents a chronic disorder in which patients traumatically remove their own hair in a bizarre pattern. Like obsessive-compulsive disorder, the hair-pulling behavior is recognized as senseless and undesirable, but is performed in response to several emotions and affects, such as increasing anxiety, or unconscious conflicts with a resultant tension relief. The condition may be episodic, but is usually chronic and difficult to treat. We present three cases of trichotillomania and review common clinical and pathologic findings of this, often chronic and socially debilitating, disorder. In addition, we discuss treatment options for dermatologists and how the collaboration with psychiatrists is the most effective management for these difficult-to-treat patients.
- Published
- 2007
34. A numeric study of the noise-induced tremor in a mathematical model of the stretch reflex.
- Author
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Santillán M, Hernández-Pérez R, and Delgado-Lezama R
- Subjects
- Animals, Cats, Muscle Contraction physiology, Stochastic Processes, Models, Biological, Muscle, Skeletal physiology, Reflex, Stretch physiology, Tremor physiopathology
- Abstract
A mathematical model of the stretch reflex for the cat soleus muscle is presented. The time-delay differential equations of the model are solved using the fourth-order Runge-Kutta algorithm, introducing a Gaussian-noise term to simulate the environmental noise. The muscle response dynamics are then studied under various levels of average muscle activation. Finally, the feasibility of explaining the so-called physiological tremor from the properties of the stretch reflex mechanisms is discussed by comparing our results with reported experimental evidence.
- Published
- 2003
- Full Text
- View/download PDF
35. [Massive paracentesis and administration of dextran 70 vs albumin in cirrhotic patients with tense ascites].
- Author
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Hernández Pérez RE, Aguilar Ramírez JR, Hernández López JM, and Gómez Maganda y Silva TG
- Subjects
- Aged, Female, Humans, Liver Cirrhosis diagnosis, Liver Function Tests, Male, Middle Aged, Models, Biological, Albumins administration & dosage, Ascites therapy, Dextrans administration & dosage, Liver Cirrhosis complications, Punctures
- Abstract
Some studies have demonstrated that paracentesis for large-volume extraction of ascites produces renal failure and hyponatremia, and intravenous infusion of plasma expanders can overcome this complications. We performed a survey where we compared effectiveness of dextran 70 vs albumin on prevention of adverse effects and cost differences. Two random groups were formed, 8 cirrhotic patients with tense ascites in each group. Paracentesis with extraction of more than 5 liters was performed. The group A received human albumin and group B dextran 70, both received 6 g per liter of extracted liquid. 24 hours before and 48 hours after of ascites extraction, we performed hepatic function test, blood chemistry with renin and aldosterone. Clinical results and biochemistry test were similar in both groups without statistical significance (p > 0.05). Amount of plasma expander was almost the same, but the cost in group A was $266 USD and in group B $20.8 USD. Azotemia was present in 12.5% in group A and hyponatremia in 12.5% in both groups, without symptoms. The results show that dextran 70 produces the same effect like albumin in the treatment of ascites after large-volume paracentesis with lower cost.
- Published
- 1995
36. [The seroprevalence of antibodies against the hepatitis C virus in blood donors at the Hospital Central Militar].
- Author
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Hernández-Pérez RE, Frías-Salcedo JA, and Del Angel-Guevara O
- Subjects
- Adolescent, Adult, Age Distribution, Hepatitis C epidemiology, Hepatitis C immunology, Hospitals, Military, Humans, Male, Mexico epidemiology, Middle Aged, Prevalence, Retrospective Studies, Seroepidemiologic Studies, Blood Donors, Hepacivirus immunology, Hepatitis Antibodies blood
- Abstract
The main transmission mechanism for hepatitis C virus is through blood products. In order to know seroprevalence of antibodies in military personnel, 2,564 samples at the Central Military Hospital with a second generation Enzymatic Immunoassay (EIA-2) were studied. All participants were males; the mean age was 25 years (range 17-47). Positive results were found in 19 potential donors (0.74%); similar seroprevalences have been reported by others. Patient selection helps to improve the safety of transfusions.
- Published
- 1994
37. [The transjugular intrahepatic portosystemic stent-shunt (TIPS) in the management of portal hypertension. A preliminary report].
- Author
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Aguilar Ramírez JR, Alcantara Peraza RA, Hernández Pérez RE, Gómez Maganda y Silva T, Heredia Jarero NM, Torres Valadez F, and Gómez del Campo López A
- Subjects
- Adult, Aged, Ascites etiology, Ascites surgery, Elective Surgical Procedures, Esophageal and Gastric Varices etiology, Esophageal and Gastric Varices surgery, Female, Gastrointestinal Hemorrhage etiology, Gastrointestinal Hemorrhage surgery, Humans, Hypertension, Portal complications, Liver Cirrhosis complications, Liver Cirrhosis surgery, Male, Middle Aged, Prospective Studies, Stents, Hypertension, Portal surgery, Portasystemic Shunt, Surgical methods
- Abstract
Transjugular intrahepatic portosystemic shunt-stent (TIPS) was performed in 5 patients with cirrhosis and portal hypertension. Bleeding varices occurred in 4 patients and refractory ascites in one. We used 2 Wallstents and 3 Strecker stents. Shunt patency, recurrent variceal hemorrhage and ascites were evaluated. The shunts were created from a transjugular approach between the hepatic and portal vein, with diameters of 10 mm. Portal pressure was adequately decreased in all cases. The hospital stay, following TIPS was 3 days. Complete variceal decompression was identified endoscopically in 3 patients, and partial in one. Four shunts were patent by ultrasound and color Doppler at 1 to 6 months of follow up. One patient presented encephalopathy and one died at third day after TIPS. Initial results suggest that TIPS is an effective method of portal decompression for treatment of variceal hemorrhage and refractory ascites. The main complication was encephalopathy and only one patient died.
- Published
- 1994
38. Symmetrical deforming cutaneous sporotrichosis of long duration.
- Author
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Hernández Pérez R, Borregales Torres E, Garcia de Mendez M, Sauerteig E, and Salfelder K
- Subjects
- Hand Dermatoses microbiology, Humans, Male, Middle Aged, Sporotrichosis drug therapy, Hand Deformities, Acquired microbiology, Hand Dermatoses complications, Sporotrichosis complications
- Abstract
A symmetrical deforming cutaneous sporotrichosis with verrucous lesions on both hands and of long clinical duration is reported. The difficulties in making an etiological diagnosis are considered.
- Published
- 1992
- Full Text
- View/download PDF
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