Timing of interactions across the visual field in the human cortex
| Autor: | Michel Dojat, Chantal Delon-Martin, Jean Bullier, Simo Vanni, Jan Warnking, Christoph Segebarth |
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| Přispěvatelé: | Centre de recherche cerveau et cognition (CERCO), Institut des sciences du cerveau de Toulouse. (ISCT), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Neuroimagerie Fonctionnelle et Metabolique, Université Joseph Fourier - Grenoble 1 (UJF)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Dojat, Michel |
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Male
MESH: Evoked Potentials Visual genetic structures Individuality Motion Perception Visual system Functional Laterality MESH: Magnetic Resonance Imaging 0302 clinical medicine Cortex (anatomy) MESH: Brain Mapping MESH: Individuality Visual Cortex Brain Mapping MESH: Middle Aged medicine.diagnostic_test MESH: Retina 05 social sciences Middle Aged Magnetic Resonance Imaging P200 Visual field medicine.anatomical_structure MESH: Photic Stimulation Neurology MESH: Motion Perception Human visual system model Visual Perception Female [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC] Psychology Adult Visual N1 Interaction Cognitive Neuroscience Models Neurological Retina 050105 experimental psychology 03 medical and health sciences Human cortex MESH: Models Neurological medicine Humans 0501 psychology and cognitive sciences [SDV.NEU] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC] MESH: Functional Laterality MESH: Humans MESH: Visual Perception MESH: Visual Cortex MESH: Adult eye diseases MESH: Male Evoked Potentials Visual Visual Fields MESH: Visual Fields Functional magnetic resonance imaging Neuroscience N2pc MESH: Female Photic Stimulation 030217 neurology & neurosurgery |
| Zdroj: | NeuroImage NeuroImage, Elsevier, 2004, 21 (3), pp.818-28. ⟨10.1016/j.neuroimage.2003.10.035⟩ NeuroImage, 2004, 21 (3), pp.818-28. ⟨10.1016/j.neuroimage.2003.10.035⟩ |
| ISSN: | 1053-8119 1095-9572 |
| DOI: | 10.1016/j.neuroimage.2003.10.035⟩ |
| Popis: | International audience; While it is generally believed that interactions across long distances in the visual field occur only in the higher-order cortical areas, other results suggest that such interactions are processed very early. In the preceding paper, we identified the latencies within a subset of cortical areas in the human visual system. In the present study, we test in which areas and at which latencies the responses to two visual patterns start interacting. We used functional magnetic resonance imaging directly combined with visual-evoked potential source analysis. Interactions appeared first anterolaterally to the retinotopic areas, at 80 ms for two stimuli presented in the left lower visual quadrant and at 100 ms for symmetrical stimulation of both lower quadrants. In the lateral occipital-V5 region (LOV5), two patterns presented simultaneously in one quadrant elicited a response with shorter latency and infra-linear addition of the amplitudes compared with the patterns presented separately. For bilateral stimulation, the timing of the LOV5 response coincided with the response to contralateral stimulation alone. Other visual areas showed interactions appearing later than within LOV5: starting at 150 ms in V1, at 120 ms in V3-V3a for the left visual hemifield stimulation and at 160 ms for both visual hemifields stimulation. Our data show that distinct patterns in the visual field interact first in LOV5, suggesting that this region must be the first to pool spatial information across the whole visual field. |
| Databáze: | OpenAIRE |
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