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Start Over Descriptor "MESH : Imagination" Topic 03 medical and health sciences
3 results on '"MESH : Imagination"'

1. Effects of peripheral and central visual impairment on mental imagery capacity

Author

Zenon W. Pylyshyn, David Dulin, Yvette Hatwell, Sylvie Chokron, laboratoire Charles Fabry de l'Institut d'Optique / Optique atomique, Laboratoire Charles Fabry de l'Institut d'Optique (LCFIO), Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Psychologie et NeuroCognition (LPNC), Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Laboratoire Psychologie de la Perception (LPP - UMR 8242), Université Paris Descartes - Paris 5 (UPD5)-Centre National de la Recherche Scientifique (CNRS), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire Charles Fabry de l'Institut d'Optique ( LCFIO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut d'Optique Graduate School ( IOGS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Paris-Sud - Paris 11 ( UP11 ) -Institut d'Optique Graduate School ( IOGS ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Psychologie et NeuroCognition ( LPNC ), Université Pierre Mendès France - Grenoble 2 ( UPMF ) -Université Joseph Fourier - Grenoble 1 ( UJF ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ), Laboratoire Psychologie de la Perception ( LPP - UMR 8242 ), and Université Paris Descartes - Paris 5 ( UPD5 ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
MESH : Imagination, Diagnostic Imaging, Visual perception, genetic structures, MESH : Brain Mapping, Cognitive Neuroscience, MESH : Diagnostic Imaging, Visual impairment, Vision Disorders, Neurological disorder, 050105 experimental psychology, Perceptual Disorders, 03 medical and health sciences, Behavioral Neuroscience, 0302 clinical medicine, medicine, Animals, Humans, 0501 psychology and cognitive sciences, MESH: Animals, MESH : Perceptual Disorders, Hemianopsia, MESH: Brain Mapping, MESH: Imagination, MESH: Perceptual Disorders, Brain Mapping, MESH: Humans, MESH: Diagnostic Imaging, MESH : Humans, 05 social sciences, Neuropsychology, medicine.disease, MESH : Vision Disorders, Neuropsychology and Physiological Psychology, MESH: Vision Disorders, [ SDV.NEU ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Mental representation, Imagination, Auditory imagery, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], MESH : Animals, medicine.symptom, Psychology, 030217 neurology & neurosurgery, Mental image, Cognitive psychology
Abstract

International audience; This paper reviews a number of behavioral, neuropsychological and neuroimaging studies that bear on the question of whether and how visual disorders of peripheral or central origin lead to disorders of mental imagery capacity. The review of the literature suggests that in cases of blindness of peripheral origin lack of vision can progressively lead to representational disorders. However, in patients suffering from peripheral visual deficits, representational disorders can partially or completely be compensated by other sensory modalities as well as by cortical reorganization. Interestingly, in brain-damaged patients, neurovisual disorders following occipital or parietal lesions are not systematically associated with representational deficits, thus demonstrating that visual perception and visual imagery may not rely on the same cortical structures as previously hypothesized. Impairments seen on mental imagery tasks among brain-damaged patients with visual and/or spatial deficits might be due to an often co-existing attentional deficit. We discuss this possible dissociation between visual perception and visual mental imagery and its implications for theoretical models of mental representation.

Published
2008

2. Retinotopic organization of visual mental images as revealed by functional magnetic resonance imaging

Author

Jean-François Mangin, Ferath Kherif, Jean-Baptiste Poline, Denis Le Bihan, Jessica Dubois, Guillaume Flandin, Stephen M. Kosslyn, Michel Denis, Isabelle Klein, Département de radiothérapie, CRLCC Val d'Aurelle - Paul Lamarque, Institut de recherche en cancérologie de Montpellier ( IRCM ), Université Montpellier 1 ( UM1 ) -CRLCC Val d'Aurelle - Paul Lamarque-Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Université de Montpellier ( UM ), Laboratoire de Neuroimagerie Assistée par Ordinateur ( LNAO ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Service Hospitalier Frédéric Joliot ( SHFJ ), Direction de Recherche Fondamentale (CEA) ( DRF (CEA) ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Center for Neuroscience and Behavioral Medicine, Children's National Medical Center, Service NEUROSPIN ( NEUROSPIN ), Institut de Génétique et Développement de Rennes ( IGDR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -IFR140-Centre National de la Recherche Scientifique ( CNRS ), Biogéosciences [Dijon] ( BGS ), AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur ( LIMSI ), Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), Department of Psychology, Harvard University ( Department of Psychology, Harvard University ), Université de Lille, Sciences Humaines et Sociales, IFR de Neuroimagerie Fonctionnelle ( IFR 49 ), Human Brain Research Center [Kyoto] ( HBRC ), Kyoto University [Kyoto], Service Hospitalier Frédéric Joliot (SHFJ), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur (LIMSI), Université Paris-Sud - Paris 11 (UP11)-Sorbonne Université - UFR d'Ingénierie (UFR 919), Sorbonne Université (SU)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Saclay (COmUE), Harvard University, Massachusetts General Hospital [Boston], Institut de recherche en cancérologie de Montpellier (IRCM - U896 Inserm - UM1), Université Montpellier 1 (UM1)-CRLCC Val d'Aurelle - Paul Lamarque-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), Laboratoire de Neuroimagerie Assistée par Ordinateur (LNAO), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service NEUROSPIN (NEUROSPIN), Institut de Génétique et Développement de Rennes (IGDR), Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Biogéosciences [UMR 6282] [Dijon] (BGS), Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Centre National de la Recherche Scientifique (CNRS), Department of Psychology, Harvard University (Department of Psychology, Harvard University), Harvard University [Cambridge], IFR de Neuroimagerie Fonctionnelle (IFR 49), Human Brain Research Center [Kyoto] (HBRC), and Le Bihan, Denis

Subjects
Male, Visual perception, MESH : Oxygen, genetic structures, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, MESH : Brain Mapping, MESH : Photic Stimulation, Mental imagery, MESH: Magnetic Resonance Imaging, Behavioral Neuroscience, 0302 clinical medicine, Mental Processes, Cluster Analysis, MESH : Female, Evoked Potentials, MESH: Mental Processes, MESH: Brain Mapping, [ SDV.IB.IMA ] Life Sciences [q-bio]/Bioengineering/Imaging, Brain Mapping, medicine.diagnostic_test, 05 social sciences, fMRI, Retinotopy, MESH : Adult, Magnetic Resonance Imaging, Visual field, MESH: Evoked Potentials, medicine.anatomical_structure, MESH: Photic Stimulation, Imagination, Visual Perception, Female, Psychology, MESH : Visual Perception, MESH: Oxygen, Mental image, MESH : Orientation, Adult, MESH : Imagination, Cognitive Neuroscience, MESH : Mental Processes, MESH : Male, MESH: Acoustic Stimulation, MESH: Orientation, Experimental and Cognitive Psychology, Sensory system, MESH : Visual Cortex, 050105 experimental psychology, 03 medical and health sciences, Neuroimaging, MESH : Visual Pathways, Orientation, MESH : Magnetic Resonance Imaging, medicine, Humans, MESH : Cluster Analysis, 0501 psychology and cognitive sciences, Visual Pathways, Visual cortex, MESH: Imagination, MESH: Visual Pathways, MESH: Humans, MESH: Visual Perception, MESH : Evoked Potentials, MESH : Humans, MESH: Visual Cortex, MESH: Adult, MESH : Acoustic Stimulation, MESH: Cluster Analysis, MESH: Male, Oxygen, [SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging, Acoustic Stimulation, Functional magnetic resonance imaging, Neuroscience, MESH: Female, 030217 neurology & neurosurgery, Photic Stimulation
Abstract

International audience; In this study, we used event-related functional magnetic resonance imaging to investigate whether visual mental images retinotopically activate early visual cortex. Six participants were instructed to visualize or view horizontally or vertically oriented flashing bow-tie shaped stimuli. When compared to baseline, imagery globally activated Area V1. When the activation evoked by the stimuli at the different orientations was directly compared, distinct spatial activation patterns were obtained for each orientation in most participants. Not only was the topography of the activation patterns from imagery similar to the topography obtained with a corresponding visual perception task, but it closely matched the individual cortical representation of either the horizontal or the vertical visual field meridians. These findings strongly support that visual imagery and perception share low-level anatomical substrate and functional processes. Binding of spatial features is suggested as one possible mechanism.

Published
2004

3. Colour, face, and visuospatial imagery abilities in low-vision individuals with visual field deficits

Author

Sylvie Chokron, Paolo Bartolomeo, Céline Cavézian, Coline Serrière, Anne-Catherine Bachoud-Lévi, David Dulin, laboratoire Charles Fabry de l'Institut d'Optique / Optique atomique, Laboratoire Charles Fabry de l'Institut d'Optique (LCFIO), Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11), Centre de référence maladie de Huntington, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Henri Mondor-CHU Pitié-Salpêtrière [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-CHU Trousseau [APHP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Institut Mondor de Recherche Biomédicale (IMRB), Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR10-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Service de neurologie [Mondor], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Henri Mondor-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Centre de Recherche de l'Institut du Cerveau et de la Moelle épinière (CRICM), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire Psychologie de la Perception (LPP - UMR 8242), Université Paris Descartes - Paris 5 (UPD5)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Psychologie et NeuroCognition (LPNC), Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-CHU Trousseau [APHP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire Charles Fabry de l'Institut d'Optique ( LCFIO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut d'Optique Graduate School ( IOGS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Paris-Sud - Paris 11 ( UP11 ) -Institut d'Optique Graduate School ( IOGS ) -Centre National de la Recherche Scientifique ( CNRS ), Assistance publique - Hôpitaux de Paris (AP-HP)-Hôpital Henri Mondor-CHU Pitié-Salpêtrière [APHP]-CHU Trousseau [APHP], Institut Mondor de Recherche Biomédicale ( IMRB ), Institut National de la Santé et de la Recherche Médicale ( INSERM ) -IFR10-Université Paris-Est Créteil Val-de-Marne - Paris 12 ( UPEC UP12 ), Assistance publique - Hôpitaux de Paris (AP-HP)-Hôpital Henri Mondor-Université Paris-Est Créteil Val-de-Marne - Paris 12 ( UPEC UP12 ), Centre de Recherche de l'Institut du Cerveau et de la Moelle épinière ( CRICM ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Psychologie de la Perception ( LPP - UMR 8242 ), Université Paris Descartes - Paris 5 ( UPD5 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Psychologie et NeuroCognition ( LPNC ), Université Pierre Mendès France - Grenoble 2 ( UPMF ) -Université Joseph Fourier - Grenoble 1 ( UJF ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Sorbonne Université (SU)-CHU Trousseau [APHP], and CHU Trousseau [APHP]

Subjects
Male, Visual perception, genetic structures, Physiology, MESH: Magnetic Resonance Imaging, 0302 clinical medicine, MESH : Female, MESH: Neuroimaging, General Psychology, MESH : Judgment, media_common, MESH: Middle Aged, 05 social sciences, Brain, General Medicine, Middle Aged, MESH : Adult, Magnetic Resonance Imaging, MESH: Case-Control Studies, Visual field, Neuropsychology and Physiological Psychology, MESH : Retinitis Pigmentosa, Imagination, Visual Perception, Peripheral visual field loss, Auditory imagery, Female, MESH : Face, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], MESH : Vision, Low, Psychology, MESH : Visual Perception, MESH: Face, Retinitis Pigmentosa, Mental image, Cognitive psychology, Adult, MESH : Imagination, MESH : Case-Control Studies, MESH : Male, MESH: Hemianopsia, media_common.quotation_subject, Color, Vision, Low, Neuroimaging, MESH : Visual Fields, Experimental and Cognitive Psychology, MESH: Vision, Low, 050105 experimental psychology, Judgment, MESH: Brain, 03 medical and health sciences, Visual memory, MESH : Magnetic Resonance Imaging, Physiology (medical), Perception, Humans, MESH : Neuroimaging, MESH : Middle Aged, 0501 psychology and cognitive sciences, MESH : Hemianopsia, MESH: Imagination, MESH: Color, MESH: Judgment, MESH: Humans, MESH: Visual Perception, MESH : Humans, MESH: Adult, MESH: Male, eye diseases, Low vision, MESH : Color, MESH : Brain, Case-Control Studies, Face, [ SDV.NEU ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Hemianopsia, MESH: Retinitis Pigmentosa, Visual Fields, MESH: Visual Fields, MESH: Female, 030217 neurology & neurosurgery
Abstract

International audience; This study investigates to what extent visual perception integrity is necessary for visual mental imagery. Sixteen low-vision participants with severe peripheral visual field loss, 16 with severe central field loss, 6 left brain-damaged patients with right homonymous hemianopia, 6 right brain-damaged patients with left homonymous hemianopia, and 16 normally sighted controls performed perceptual and imagery tasks using colours, faces, and spatial relationships. Results showed that (a) the perceptual and mental image>ry disorders vary according to the type of visual field loss, (b) hemianopics had no more difficulties imagining spatial stimuli in their contralesional hemispace than in their ipsilesional one, and (c) the only hemianopic participant to have perceptual and mental imagery impairments suffered from attentional deficits. Results suggest that (a) visual memory is not definitively established, but rather needs perceptual practice to be maintained, and (b) that visual mental imagery may involve some of the attentional-exploratory mechanisms that are employed in visual behaviour.

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