Modeling the time course of attention signals in human primary visual cortex

2006 ◽  
Author(s):  
Michael A. Silver
Keyword(s):  
Visual Cortex ◽  
Primary Visual Cortex ◽  
Time Course ◽  
Time Course Of Attention

scholarly journals Magnitude, time course, and specificity of rapid adaptation across mouse visual areas

2020 ◽  
Vol 124 (1) ◽  
pp. 245-258 ◽  
Author(s):  
Miaomiao Jin ◽  
Lindsey L. Glickfeld
Keyword(s):  
Visual Cortex ◽  
Visual System ◽  
Primary Visual Cortex ◽  
Sensory Processing ◽  
Time Course ◽  
Recent Experience ◽  
Rapid Adaptation ◽  
It Impacts ◽  
Visual Areas ◽  
Higher Visual Areas

Rapid adaptation dynamically alters sensory signals to account for recent experience. To understand how adaptation affects sensory processing and perception, we must determine how it impacts the diverse set of cortical and subcortical areas along the hierarchy of the mouse visual system. We find that rapid adaptation strongly impacts neurons in primary visual cortex, the higher visual areas, and the colliculus, consistent with its profound effects on behavior.

scholarly journals Time course of cytochrome oxidase blob plasticity in the primary visual cortex of adult monkeys after retinal laser lesions

2018 ◽  
Vol 527 (3) ◽  
pp. 600-613
Author(s):  
Mariana F. Farias ◽  
Leslie G. Ungerleider ◽  
Sandra S. Pereira ◽  
Ana Karla J. Amorim ◽  
Juliana G. M. Soares ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Cytochrome Oxidase ◽  
Primary Visual Cortex ◽  
Time Course

Dynamics of Receptive Field Size in Primary Visual Cortex

2007 ◽  
Vol 97 (1) ◽  
pp. 407-414 ◽  
Author(s):  
Brian J. Malone ◽  
Vikas R. Kumar ◽  
Dario L. Ringach
Keyword(s):  
Visual Cortex ◽  
Receptive Field ◽  
Primary Visual Cortex ◽  
Time Course ◽  
Spatial Scales ◽  
Field Size ◽  
Spatial Period ◽  
Simple Cells ◽  
Early Visual Cortex ◽  
Spatio Temporal

Recent studies have shown that the initial responses evoked by a stimulus in neurons of primary visual cortex are dominated by low spatial frequency information in the image, whereas finer spatial scales dominate later in the response. Such phenomena could arise from the dynamics of receptive field (RF) size at early stages of cortical processing. We measured changes in RF size in simple cells recorded from the primary visual cortex of anesthetized macaques by measuring their first-order spatio-temporal kernels and fitting them with two-dimensional Gabor functions at different time slices. We found that the width and length of the RF envelope and the period of the carrier tend to decrease during the time-course of the response. The most pronounced changes are seen in the width and spatial period of the RFs, which decrease by 15% during the central 20 ms of the response. These results show a novel form of spatio-temporal inseparability in simple cells and are consistent with the notion of a coarse-to-fine processing of information in early visual cortex.

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