Surround suppression and sparse coding in visual and barrel cortices
Identifieur interne : 002698 ( Pmc/Corpus ); précédent : 002697; suivant : 002699Surround suppression and sparse coding in visual and barrel cortices
Auteurs : Robert N. S. Sachdev ; Matthew R. Krause ; James A. MazerSource :
- Frontiers in Neural Circuits [ 1662-5110 ] ; 2012.
Abstract
During natural vision the entire retina is stimulated. Likewise, during natural tactile behaviors, spatially extensive regions of the somatosensory surface are co-activated. The large spatial extent of naturalistic stimulation means that surround suppression, a phenomenon whose neural mechanisms remain a matter of debate, must arise during natural behavior. To identify common neural motifs that might instantiate surround suppression across modalities, we review models of surround suppression and compare the evidence supporting the competing ideas that surround suppression has either cortical or sub-cortical origins in visual and barrel cortex. In the visual system there is general agreement lateral inhibitory mechanisms contribute to surround suppression, but little direct experimental evidence that intracortical inhibition plays a major role. Two intracellular recording studies of V1, one using naturalistic stimuli (Haider et al.,
Url:
DOI: 10.3389/fncir.2012.00043
PubMed: 22783169
PubMed Central: 3389675
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