scholarly journals Attention Reshapes Center-Surround Receptive Field Structure in Macaque Cortical Area MT

2009 ◽  
Vol 19 (10) ◽  
pp. 2466-2478 ◽  
Author(s):  
Katharina Anton-Erxleben ◽  
Valeska M. Stephan ◽  
Stefan Treue
Keyword(s):  
Receptive Field ◽  
Cortical Area ◽  
Field Structure ◽  
Area Mt

scholarly journals Complex and dynamic receptive field structure in macaque cortical area V4d

2004 ◽  
Vol 4 (8) ◽  
pp. 184-184 ◽  
Author(s):  
W. A. Freiwald ◽  
D. Y. Tsao ◽  
R. B. H. Tootell ◽  
M. S. Livingstone
Keyword(s):  
Receptive Field ◽  
Cortical Area ◽  
Field Structure

Receptive field structure in cortical area 3b of the alert monkey

2002 ◽  
Vol 135 (1-2) ◽  
pp. 167-178 ◽  
Author(s):  
James J DiCarlo ◽  
Kenneth O Johnson
Keyword(s):  
Receptive Field ◽  
Cortical Area ◽  
Field Structure ◽  
Alert Monkey ◽  
Area 3B

DEVELOPMENT OF FEEDFORWARD RECEPTIVE FIELD STRUCTURE OF A SIMPLE CELL AND ITS CONTRIBUTION TO THE ORIENTATION SELECTIVITY: A MODELING STUDY

2005 ◽  
Vol 15 (01n02) ◽  
pp. 55-70 ◽  
Author(s):  
AKHIL R GARG ◽  
KLAUS OBERMAYER ◽  
BASABI BHAUMIK
Keyword(s):  
Receptive Field ◽  
Field Structure ◽  
Orientation Selectivity ◽  
Simple Cell ◽  
Homogeneous State ◽  
Synaptic Efficacy ◽  
Synaptic Interactions ◽  
Experimental Findings ◽  
Modeling Study

Recent experimental studies of hetero-synaptic interactions in various systems have shown the role of signaling in the plasticity, challenging the conventional understanding of Hebb's rule. It has also been found that activity plays a major role in plasticity, with neurotrophins acting as molecular signals translating activity into structural changes. Furthermore, role of synaptic efficacy in biasing the outcome of competition has also been revealed recently. Motivated by these experimental findings we present a model for the development of simple cell receptive field structure based on the competitive hetero-synaptic interactions for neurotrophins combined with cooperative hetero-synaptic interactions in the spatial domain. We find that with proper balance in competition and cooperation, the inputs from two populations (ON/OFF) of LGN cells segregate starting from the homogeneous state. We obtain segregated ON and OFF regions in simple cell receptive field. Our modeling study supports the experimental findings, suggesting the role of synaptic efficacy and the role of spatial signaling. We find that using this model we obtain simple cell RF, even for positively correlated activity of ON/OFF cells. We also compare different mechanism of finding the response of cortical cell and study their possible role in the sharpening of orientation selectivity. We find that degree of selectivity improvement in individual cells varies from case to case depending upon the structure of RF field and type of sharpening mechanism.

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