Functional selectivity in the human occipitotemporal cortex during natural vision: Evidence from combined intracranial EEG and eye-tracking

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dc.contributor.authorHamame, Carlos M.
dc.contributor.authorVidal, Juan R.
dc.contributor.authorPerrone-Bertolotti, Marcela
dc.contributor.authorOssandon, Tomas
dc.contributor.authorJerbi, Karim
dc.contributor.authorKahane, Philippe
dc.contributor.authorBertrand, Olivier
dc.contributor.authorLachaux, Jean-Philippe
dc.date.accessioned2025-01-23T21:44:26Z
dc.date.available2025-01-23T21:44:26Z
dc.date.issued2014
dc.description.abstractEye movements are a constant and essential component of natural vision, yet, most of our knowledge about the human visual system comes from experiments that restrict them. This experimental constraint is mostly in place to control visual stimuli presentation and to avoid artifacts in non-invasive measures of brain activity, however, this limitation can be overcome with intracranial EEG (iEEG) recorded from epilepsy patients. Moreover, the high-frequency components of the iEEG signal (between about 50 and 150 Hz) can provide a proxy of population-level spiking activity in any cortical area during free-viewing. We combined iEEG with high precision eye-tracking to study fine temporal dynamics and functional specificity in the fusiform face (FFA) and visual word form area (VWFA) while patients inspected natural pictures containing faces and text. We defined the first local measure of visual (electrophysiological) responsiveness adapted to free-viewing in humans: amplitude modulations in the high-frequency activity range (50-150 Hz) following fixations (fixation-related high-frequency response). We showed that despite the large size of receptive fields in the ventral occipito-temporal cortex, neural activity during natural vision of realistic cluttered scenes is mostly dependent upon the category of the foveated stimulus - suggesting that category-specificity is preserved during free-viewing and that attention mechanisms might filter out the influence of objects surrounding the fovea. (C) 2014 Elsevier Inc. All rights reserved.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.neuroimage.2014.03.025
dc.identifier.eissn1095-9572
dc.identifier.issn1053-8119
dc.identifier.urihttps://doi.org/10.1016/j.neuroimage.2014.03.025
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101693
dc.identifier.wosidWOS:000337267900025
dc.language.isoen
dc.pagina.final286
dc.pagina.inicio276
dc.revistaNeuroimage
dc.rightsacceso restringido
dc.subjectNatural vision
dc.subjectIntracranial EEG
dc.subjectEye movements
dc.subjectHigh frequency gamma activity
dc.subjectFusiform face area
dc.subjectVisual word form area
dc.titleFunctional selectivity in the human occipitotemporal cortex during natural vision: Evidence from combined intracranial EEG and eye-tracking
dc.typeartículo
dc.volumen95
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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