Statistics of lateral geniculate nucleus (LGN) activity determine the segregation of ON/OFF subfields for simple cells in visual cortex
AUTOR(ES)
Lee, Ann B.
FONTE
The National Academy of Sciences
RESUMO
The receptive fields for simple cells in visual cortex show a strong preference for edges of a particular orientation and display adjacent excitatory and inhibitory subfields. These subfields are projections from ON-center and OFF-center lateral geniculate nucleus cells, respectively. Here we present a single-cell model using ON and OFF channels, a natural scene environment, and synaptic modification according to the Bienenstock, Cooper, and Munro (BCM) theory. Our results indicate that lateral geniculate nucleus cells must act predominantly in the linear region around the level of spontaneous activity, to lead to the observed segregation of ON/OFF subfields.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=18857Documentos Relacionados
- The binocular input to cells in the feline dorsal lateral geniculate nucleus (dLGN).
- Target-dependent on/off switch increases ribozyme fidelity
- Creation of a reversible on/off system for site-specific in vivo control of exogenous gene activity in the renal glomerulus.
- The function of bursts of spikes during visual fixation in the awake primate lateral geniculate nucleus and primary visual cortex
- Effects of visual deprivation on the development of the monkey's lateral geniculate nucleus.