Retinal ganglion cells--spatial organization of the receptive field reduces temporal redundancy.

ABSTRACT: According to the 'redundancy reduction' hypothesis, a visual neuron removes correlations from an image to reduce redundancy in the spike train, thus increasing the efficiency of information coding. However, all elaborations of this general hypothesis have treated spatial and temporal correlations separately. To investigate how a retinal ganglion cell responds to combined spatial and temporal correlations, we selected those cells with center-surround receptive field and presented a stimulus with strong spatiotemporal correlations: we presented a random sequence of intensities (of white noise) to the receptive field center and then activated the surround with the same sequence. We found that, for most cells, activating the surround reduced temporal redundancy in the spike train. Although the

SUBMITTER: Tokutake Y 

PROVIDER: S-EPMC2849110 | biostudies-literature | 2008 Sep

REPOSITORIES: biostudies-literature