TY - JOUR
T1 - Sensitivity to timing and order in human visual cortex
AU - Singer, Jedediah M.
AU - Madsen, Joseph R.
AU - Anderson, William S.
AU - Kreiman, Gabriel
N1 - Publisher Copyright:
© 2015 the American Physiological Society.
PY - 2015
Y1 - 2015
N2 - Visual recognition takes a small fraction of a second and relies on the cascade of signals along the ventral visual stream. Given the rapid path through multiple processing steps between photoreceptors and higher visual areas, information must progress from stage to stage very quickly. This rapid progression of information suggests that fine temporal details of the neural response may be important to the brain’s encoding of visual signals. We investigated how changes in the relative timing of incoming visual stimulation affect the representation of object information by recording intracranial field potentials along the human ventral visual stream while subjects recognized objects whose parts were presented with varying asynchrony. Visual responses along the ventral stream were sensitive to timing differences as small as 17 ms between parts. In particular, there was a strong dependency on the temporal order of stimulus presentation, even at short asynchronies. From these observations we infer that the neural representation of complex information in visual cortex can be modulated by rapid dynamics on scales of tens of milliseconds.
AB - Visual recognition takes a small fraction of a second and relies on the cascade of signals along the ventral visual stream. Given the rapid path through multiple processing steps between photoreceptors and higher visual areas, information must progress from stage to stage very quickly. This rapid progression of information suggests that fine temporal details of the neural response may be important to the brain’s encoding of visual signals. We investigated how changes in the relative timing of incoming visual stimulation affect the representation of object information by recording intracranial field potentials along the human ventral visual stream while subjects recognized objects whose parts were presented with varying asynchrony. Visual responses along the ventral stream were sensitive to timing differences as small as 17 ms between parts. In particular, there was a strong dependency on the temporal order of stimulus presentation, even at short asynchronies. From these observations we infer that the neural representation of complex information in visual cortex can be modulated by rapid dynamics on scales of tens of milliseconds.
KW - Computational models
KW - Electrocorticography
KW - Human neurophysiology
KW - Intracranial field potentials
KW - Temporal coding
KW - Ventral visual cortex
KW - Visual object recognition
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U2 - 10.1152/jn.00556.2014
DO - 10.1152/jn.00556.2014
M3 - Article
C2 - 25429116
AN - SCOPUS:84923868393
SN - 0022-3077
VL - 113
SP - 1656
EP - 1669
JO - Journal of neurophysiology
JF - Journal of neurophysiology
IS - 5
ER -