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5 results on '"Gurvan Le Clec'H"'

1. Acquisition of a space representation by a naive agent from sensorimotor invariance and proprioceptive compensation

Author

Gurvan Le Clec’H, Bruno Gas, and J. Kevin O’Regan

Subjects
Electronics, TK7800-8360, Electronic computers. Computer science, QA75.5-76.95
Abstract

In this article, we present a simple agent which learns an internal representation of space without a priori knowledge of its environment, body, or sensors. The learned environment is seen as an internal space representation. This representation is isomorphic to the group of transformations applied to the environment. The model solves certain theoretical and practical issues encountered in previous work in sensorimotor contingency theory. Considering the mathematical description of the internal representation, analysis of its properties and simulations, we prove that this internal representation is equivalent to knowledge of space.

Published
2016
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2. Acquisition of a space representation by a naive agent from sensorimotor invariance and proprioceptive compensation

Author

J. Kevin O'Regan, Gurvan Le Clec’H, Bruno Gas, Institut des Systèmes Intelligents et de Robotique ( ISIR ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Psychologie de la Perception ( LPP - UMR 8242 ), Centre National de la Recherche Scientifique ( CNRS ) -Université Paris Descartes - Paris 5 ( UPD5 ), Institut des Systèmes Intelligents et de Robotique (ISIR), Université Pierre et Marie Curie - Paris 6 (UPMC)-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), AMAC, and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Computer science, lcsh:TK7800-8360, 02 engineering and technology, Space (commercial competition), lcsh:QA75.5-76.95, Compensation (engineering), 03 medical and health sciences, 0302 clinical medicine, Artificial Intelligence, Simple (abstract algebra), 0202 electrical engineering, electronic engineering, information engineering, [INFO.INFO-RB]Computer Science [cs]/Robotics [cs.RO], Computer vision, Sensorimotor learning, Proprioception, business.industry, Group (mathematics), Work (physics), lcsh:Electronics, [ INFO.INFO-RB ] Computer Science [cs]/Robotics [cs.RO], Representation (systemics), sensorimotor contingencies, Computer Science Applications, 020201 artificial intelligence & image processing, Artificial intelligence, lcsh:Electronic computers. Computer science, space representation, business, 030217 neurology & neurosurgery, Software
Abstract

International audience; In this article, we present a simple agent which learns an internal representation of space without a priori knowledge of its environment, body, or sensors. The learned environment is seen as an internal space representation. This representation is isomorphic to the group of transformations applied to the environment. The model solves certain theoretical and practical issues encountered in previous work in sensorimotor contingency theory. Considering the mathematical description of the internal representation, analysis of its properties and simulations, we prove that this internal representation is equivalent to knowledge of space.

Published
2016
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3. The visual word form area: a prelexical representation of visual words in the fusiform gyrus

Author

Denis Le Bihan, Laurent D. Cohen, Gurvan Le Clec'H, Jean-Baptiste Poline, Stanislas Dehaene, Service Hospitalier Frédéric Joliot (SHFJ), 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, Neuroimagerie cognitive (LCogn), Université Paris-Sud - Paris 11 (UP11)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Service NEUROSPIN (NEUROSPIN), IFR de Neuroimagerie Fonctionnelle (IFR 49), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Human Brain Research Center [Kyoto] (HBRC), Kyoto University [Kyoto], Institut de biologie et chimie des protéines [Lyon] (IBCP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Service de neurologie 1 [CHU Pitié-Salpétrière], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-CHU Pitié-Salpêtrière [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Service de Neurologie [CHU Pitié-Salpêtrière], IFR70-CHU Pitié-Salpêtrière [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), 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), Kyoto University, CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)

Subjects
Adult, Male, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, media_common.quotation_subject, Object (grammar), MESH: Reading, 050105 experimental psychology, MESH: Magnetic Resonance Imaging, 03 medical and health sciences, 0302 clinical medicine, Reading (process), Image Processing, Computer-Assisted, Reaction Time, Humans, 0501 psychology and cognitive sciences, Active listening, Visual word form area, Visual Word, media_common, Cerebral Cortex, Communication, Fusiform gyrus, MESH: Humans, business.industry, General Neuroscience, 05 social sciences, Cognitive neuroscience of visual object recognition, MESH: Adult, Fusiform face area, MESH: Speech Perception, Magnetic Resonance Imaging, MESH: Image Processing, Computer-Assisted, MESH: Cerebral Cortex, MESH: Male, MESH: Reaction Time, Reading, Speech Perception, Female, business, Psychology, MESH: Female, 030217 neurology & neurosurgery, Cognitive psychology
Abstract

International audience; Event-related fMRI was used to test the hypothesis that the visual word form area in the left fusiform gyrus holds a modality-specific and prelexical representation of visual words. Subjects were engaged in a repetition-detection task on pairs of words or pronounceable pseudo-words that could be written or spoken. The visual word form area responded only to written stimuli, not to spoken stimuli, independently of their semantic content. We propose that the occasional activation of the fusiform gyrus when listening to spoken words is due to the topdown recruitment of visual orthographic or object representations.

Published
2002

4. Inferring behavior from functional brain images

Author

Denis Le Bihan, Stanislas Dehaene, Pierre-Francois Van de Moortele, Jean-Baptiste Poline, Gurvan Le Clec'H, Laurent D. Cohen, Service NEUROSPIN (NEUROSPIN), 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 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), Institut de biologie et chimie des protéines [Lyon] (IBCP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Service de neurologie 1 [CHU Pitié-Salpétrière], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-CHU Pitié-Salpêtrière [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), IFR de Neuroimagerie Fonctionnelle (IFR 49), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Service de Neurologie [CHU Pitié-Salpêtrière], IFR70-CHU Pitié-Salpêtrière [AP-HP], and Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)

Subjects
[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, media_common.quotation_subject, MESH: Motor Cortex, Functional Laterality, Task (project management), MESH: Magnetic Resonance Imaging, 03 medical and health sciences, Functional brain, 0302 clinical medicine, Neuroimaging, medicine, Humans, MESH: Functional Laterality, Function (engineering), ComputingMilieux_MISCELLANEOUS, MESH: Brain Mapping, 030304 developmental biology, media_common, Brain Mapping, 0303 health sciences, MESH: Humans, Basis (linear algebra), Resting state fMRI, MESH: Bronchopneumonia, General Neuroscience, Brain morphometry, MESH: Infant, Newborn, Motor Cortex, MESH: Cytomegalovirus Infections, Magnetic Resonance Imaging, MESH: Infant, MESH: Malabsorption Syndromes, medicine.anatomical_structure, MESH: Nerve Net, Nerve Net, MESH: Anemia, Hemolytic, Autoimmune, Psychology, Neuroscience, MESH: Female, 030217 neurology & neurosurgery, Motor cortex
Abstract

Most neuroimaging experiments aim to identify brain areas whose activation correlates tightly with an aspect of the subjects' behavioral task. If the logic of neuroimaging is correct, however, it should also be possible to reverse this sequence of operations. Once we understand the function of a given brain area or network of areas, it should be possible to use on-line activation measurements to infer what kind of task the subject was performing. As a first step in this direction, we report here that functional magnetic resonance images (fMRI) of motor cortex have sufficient signal-to-noise ratio to accurately predict the subject's manual behavior on a single-trial basis with close to 100% accuracy.

Published
1998
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5. Imaging unconscious semantic priming

Author

Denis Le Bihan, Ghislaine Dehaene-Lambertz, Stanislas Dehaene, Pierre-Francois Van de Moortele, Michael Mueller, Etienne Koechlin, Lionel Naccache, Gurvan Le Clec'H, Service NEUROSPIN (NEUROSPIN), 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), Service Hospitalier Frédéric Joliot (SHFJ), 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, Collège de France (CDF), Collège de France (CdF), Neuroimagerie cognitive (LCogn), Université Paris-Sud - Paris 11 (UP11)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM), University of Frankfurt, Bureau d'Économie Théorique et Appliquée (BETA), Institut National de la Recherche Agronomique (INRA)-Université de Strasbourg (UNISTRA)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Sadron (ICS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Institut d'imagerie neurofonctionnelle (IIN), Institut National de la Santé et de la Recherche Médicale (INSERM)-ENST-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École des hautes études en sciences sociales (EHESS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), IFR de Neuroimagerie Fonctionnelle (IFR 49), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Ecole Nationale Supérieure des Télécommunications (ENST)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École des hautes études en sciences sociales (EHESS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université (SU), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Frankfurt University of Applied Sciences, Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-École des hautes études en sciences sociales (EHESS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Ecole Nationale Supérieure des Télécommunications (ENST)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Center for Magnetic Resonance Research [Minneapolis] (CMRR), University of Minnesota Medical School, and University of Minnesota System-University of Minnesota System

Subjects
Adult, Male, Brain activity and meditation, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, MESH: Cognition, Subliminal Stimulation, MESH: Reading, Bioinformatics, Semantics, 050105 experimental psychology, Functional Laterality, MESH: Magnetic Resonance Imaging, Numeral system, 03 medical and health sciences, 0302 clinical medicine, Cognition, MESH: Unconscious (Psychology), Humans, 0501 psychology and cognitive sciences, Unconscious cognition, MESH: Functional Laterality, Levels-of-processing effect, Evoked Potentials, Multidisciplinary, Unconscious, Psychology, MESH: Humans, MESH: Visual Perception, 05 social sciences, Subliminal stimuli, MESH: Subliminal Stimulation, MESH: Adult, Magnetic Resonance Imaging, MESH: Male, MESH: Evoked Potentials, Reading, Visual Perception, Female, Psychology, Brain activity, Priming (psychology), MESH: Female, 030217 neurology & neurosurgery, Cognitive psychology
Abstract

International audience; Visual words that are masked and presented so briefly that they cannot be seen may nevertheless facilitate the subsequent processing of related words, a phenomenon called masked priming. It has been debated whether masked primes can activate cognitive processes without gaining access to consciousness. Here we use a combination of behavioural and brain-imaging techniques to estimate the depth of processing of masked numerical primes. Our results indicate that masked stimuli have a measurable influence on electrical and haemodynamic measures of brain activity. When subjects engage in an overt semantic comparison task with a clearly visible target numeral, measures of covert motor activity indicate that they also unconsciously apply the task instructions to an unseen masked numeral. A stream of perceptual, semantic and motor processes can therefore occur without awareness.

Published
1998
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