Perceptual Texture Dimensions Modulate Neuronal Response Dynamics in Visual Cortical Area V4

2021 ◽  
pp. JN-RM-0971-21
Author(s):  
Taekjun Kim ◽  
Wyeth Bair ◽  
Anitha Pasupathy
Keyword(s):  
Cortical Area ◽  
Neuronal Response ◽  
Response Dynamics ◽  
Area V4 ◽  
Visual Cortical Area ◽  
Visual Cortical

scholarly journals Intrinsic lattice connections of macaque monkey visual cortical area V4

1992 ◽  
Vol 12 (7) ◽  
pp. 2785-2802 ◽  
Author(s):  
T Yoshioka ◽  
JB Levitt ◽  
JS Lund
Keyword(s):  
Cortical Area ◽  
Macaque Monkey ◽  
Area V4 ◽  
Visual Cortical Area ◽  
Visual Cortical

scholarly journals Equiluminance Cells in Visual Cortical Area V4

2011 ◽  
Vol 31 (35) ◽  
pp. 12398-12412 ◽  
Author(s):  
B. N. Bushnell ◽  
P. J. Harding ◽  
Y. Kosai ◽  
W. Bair ◽  
A. Pasupathy
Keyword(s):  
Cortical Area ◽  
Area V4 ◽  
Visual Cortical Area ◽  
Visual Cortical

scholarly journals Predictive Coding in Area V4: Dynamic Shape Discrimination under Partial Occlusion

2018 ◽  
Vol 30 (5) ◽  
pp. 1209-1257 ◽  
Author(s):  
Hannah Choi ◽  
Anitha Pasupathy ◽  
Eric Shea-Brown
Keyword(s):  
Sensory Input ◽  
Predictive Coding ◽  
Shape Discrimination ◽  
Response Dynamics ◽  
Area V4 ◽  
Electrophysiological Recordings ◽  
Visual Cortical Area ◽  
Partially Occluded ◽  
Visual Cortical ◽  
Dynamic Shape

The primate visual system has an exquisite ability to discriminate partially occluded shapes. Recent electrophysiological recordings suggest that response dynamics in intermediate visual cortical area V4, shaped by feedback from prefrontal cortex (PFC), may play a key role. To probe the algorithms that may underlie these findings, we build and test a model of V4 and PFC interactions based on a hierarchical predictive coding framework. We propose that probabilistic inference occurs in two steps. Initially, V4 responses are driven solely by bottom-up sensory input and are thus strongly influenced by the level of occlusion. After a delay, V4 responses combine both feedforward input and feedback signals from the PFC; the latter reflect predictions made by PFC about the visual stimulus underlying V4 activity. We find that this model captures key features of V4 and PFC dynamics observed in experiments. Specifically, PFC responses are strongest for occluded stimuli and delayed responses in V4 are less sensitive to occlusion, supporting our hypothesis that the feedback signals from PFC underlie robust discrimination of occluded shapes. Thus, our study proposes that area V4 and PFC participate in hierarchical inference, with feedback signals encoding top-down predictions about occluded shapes.

Effect of lesions in visual cortical area V4 on the recognition of transformed objects

Nature ◽  
1995 ◽  
Vol 376 (6538) ◽  
pp. 342-344 ◽  
Author(s):  
Peter H. Schiller
Keyword(s):  
Cortical Area ◽  
Area V4 ◽  
Visual Cortical Area ◽  
Visual Cortical

Spatial and temporal frequency selectivity of neurons in visual cortical area V3A of the macaque monkey

1988 ◽  
Vol 28 (11) ◽  
pp. 1179-1191 ◽  
Author(s):  
James P. Gaska ◽  
Lowell D. Jacobson ◽  
Daniel A. Pollen
Keyword(s):  
Cortical Area ◽  
Temporal Frequency ◽  
Macaque Monkey ◽  
Frequency Selectivity ◽  
Visual Cortical Area ◽  
Visual Cortical
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