Timing, Timing, Timing: Fast Decoding of Object Information from Intracranial Field Potentials in Human Visual Cortex

Hesheng Liu; Yigal Agam; Joseph R. Madsen; Gabriel Kreiman

doi:10.1016/j.neuron.2009.02.025

Timing, Timing, Timing: Fast Decoding of Object Information from Intracranial Field Potentials in Human Visual Cortex

Neuron ◽

10.1016/j.neuron.2009.02.025 ◽

2009 ◽

Vol 62 (2) ◽

pp. 281-290 ◽

Cited By ~ 233

Author(s):

Hesheng Liu ◽

Yigal Agam ◽

Joseph R. Madsen ◽

Gabriel Kreiman

Keyword(s):

Visual Cortex ◽

Field Potentials ◽

Human Visual Cortex ◽

Fast Decoding

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Fast decoding of natural object categories from intracranial field potentials in monkey's visual cortex

Journal of Vision ◽

10.1167/10.7.947 ◽

2010 ◽

Vol 10 (7) ◽

pp. 947-947

Author(s):

M. Cauchoix ◽

T. Serre ◽

G. Kreiman ◽

D. Fize

Keyword(s):

Visual Cortex ◽

Field Potentials ◽

Natural Object ◽

Object Categories ◽

Fast Decoding

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Stimulus selectivity of broadband field potentials, but not gamma oscillations, matches population responses as measured by BOLD fMRI in human visual cortex

Journal of Vision ◽

10.1167/14.10.1432 ◽

2014 ◽

Vol 14 (10) ◽

pp. 1432-1432

Author(s):

D. Hermes ◽

K. Kay ◽

J. Winawer

Keyword(s):

Visual Cortex ◽

Gamma Oscillations ◽

Field Potentials ◽

Bold Fmri ◽

Human Visual Cortex ◽

Population Responses

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Broadband field potentials, but not gamma oscillations, correlate with BOLD fMRI in human visual cortex

Journal of Vision ◽

10.1167/15.12.1286 ◽

2015 ◽

Vol 15 (12) ◽

pp. 1286 ◽

Cited By ~ 1

Author(s):

Mai Nguyen ◽

Dora Hermes ◽

Jonathan Winawer

Keyword(s):

Visual Cortex ◽

Gamma Oscillations ◽

Field Potentials ◽

Bold Fmri ◽

Human Visual Cortex

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Modulation of Face Processing by Emotional Expression and Gaze Direction during Intracranial Recordings in Right Fusiform Cortex

Journal of Cognitive Neuroscience ◽

10.1162/jocn.2009.21404 ◽

2010 ◽

Vol 22 (9) ◽

pp. 2086-2107 ◽

Cited By ~ 35

Author(s):

Gilles Pourtois ◽

Laurent Spinelli ◽

Margitta Seeck ◽

Patrik Vuilleumier

Keyword(s):

Visual Cortex ◽

Emotional Expression ◽

Local Field ◽

Face Processing ◽

Temporal Dynamics ◽

Local Field Potentials ◽

Gaze Direction ◽

Parahippocampal Gyrus ◽

Field Potentials ◽

Human Visual Cortex

We recorded intracranial local field potentials from structurally intact human visual cortex during several face processing tasks in a patient before brain surgery. Intracranial local field potentials were measured from subdural electrodes implanted in a right fusiform region with face-sensitive activity and a more medial location in posterior parahippocampal gyrus with house-selective activity. This electrode implantation allowed us to compare neural responses with different facial properties within two adjacent but functionally distinct cortical regions. Five experiments were conducted to determine the temporal dynamics of perceptual (Experiments 1 and 5), emotional (Experiments 2 and 3), and social (Experiment 4) effects on face-specific responses in the right fusiform. Our findings showed an early negative deflection (N200) that primarily reflected category-selective perceptual encoding of facial information, whereas higher order effects of face individuation, emotional expression, and gaze direction produced selective modulations in the same face-specific region during a later time period (from 200 to 1000 msec after onset). These results shed new lights on the time course of face recognition mechanisms in human visual cortex and reveal for the first time anatomically overlapping but temporally distinct influences of identity or emotional/social factors on face processing in right fusiform gyrus, which presumably reflect top–down feedback effects from distant brain areas.

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