Primary visual cortex represents the difference between past and present
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Primary visual cortex represents the difference between past and present. / Nortmann, Nora; Rekauzke, Sascha; Onat, Selim; König, Peter; Jancke, Dirk.
in: CEREB CORTEX, Jahrgang 25, Nr. 6, 06.2015, S. 1427-40.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Primary visual cortex represents the difference between past and present
AU - Nortmann, Nora
AU - Rekauzke, Sascha
AU - Onat, Selim
AU - König, Peter
AU - Jancke, Dirk
N1 - © The Author 2013. Published by Oxford University Press.
PY - 2015/6
Y1 - 2015/6
N2 - The visual system is confronted with rapidly changing stimuli in everyday life. It is not well understood how information in such a stream of input is updated within the brain. We performed voltage-sensitive dye imaging across the primary visual cortex (V1) to capture responses to sequences of natural scene contours. We presented vertically and horizontally filtered natural images, and their superpositions, at 10 or 33 Hz. At low frequency, the encoding was found to represent not the currently presented images, but differences in orientation between consecutive images. This was in sharp contrast to more rapid sequences for which we found an ongoing representation of current input, consistent with earlier studies. Our finding that for slower image sequences, V1 does no longer report actual features but represents their relative difference in time counteracts the view that the first cortical processing stage must always transfer complete information. Instead, we show its capacities for change detection with a new emphasis on the role of automatic computation evolving in the 100-ms range, inevitably affecting information transmission further downstream.
AB - The visual system is confronted with rapidly changing stimuli in everyday life. It is not well understood how information in such a stream of input is updated within the brain. We performed voltage-sensitive dye imaging across the primary visual cortex (V1) to capture responses to sequences of natural scene contours. We presented vertically and horizontally filtered natural images, and their superpositions, at 10 or 33 Hz. At low frequency, the encoding was found to represent not the currently presented images, but differences in orientation between consecutive images. This was in sharp contrast to more rapid sequences for which we found an ongoing representation of current input, consistent with earlier studies. Our finding that for slower image sequences, V1 does no longer report actual features but represents their relative difference in time counteracts the view that the first cortical processing stage must always transfer complete information. Instead, we show its capacities for change detection with a new emphasis on the role of automatic computation evolving in the 100-ms range, inevitably affecting information transmission further downstream.
KW - Brain Mapping
KW - Chi-Square Distribution
KW - Evoked Potentials, Visual
KW - Female
KW - Form Perception
KW - Humans
KW - Male
KW - Orientation
KW - Pattern Recognition, Visual
KW - Photic Stimulation
KW - Psychophysics
KW - Time Factors
KW - Visual Cortex
KW - Visual Pathways
KW - Voltage-Sensitive Dye Imaging
U2 - 10.1093/cercor/bht318
DO - 10.1093/cercor/bht318
M3 - SCORING: Journal article
C2 - 24343889
VL - 25
SP - 1427
EP - 1440
JO - CEREB CORTEX
JF - CEREB CORTEX
SN - 1047-3211
IS - 6
ER -
