Relationship between spontaneous and evoked spike-time correlations in primate visual cortex.

ABSTRACT: Coincident spikes have been implicated in vision-related processes such as feature binding, gain modulation, and long-distance communication. The source of these spike-time correlations is unknown. Although several studies have proposed that cortical spikes are correlated based on stimulus structure, others have suggested that spike-time correlations reflect ongoing cortical activity present even in the absence of a coherent visual stimulus. To examine this issue, we collected single-unit recordings from primary visual cortex (V1) of the anesthetized and paralyzed prosimian bush baby using a 100-electrode array. Spike-time correlations for pairs of cells were compared under three conditions: a moving grating at the cells' preferred orientation, an equiluminant blank screen, and a dark cond

SUBMITTER: Jermakowicz WJ 

PROVIDER: S-EPMC2681437 | biostudies-literature | 2009 May

REPOSITORIES: biostudies-literature