Correlated activity of cortical neurons survives extensive removal of feedforward sensory input.

ABSTRACT: A fundamental property of brain function is that the spiking activity of cortical neurons is variable and that some of this variability is correlated between neurons. Correlated activity not due to the stimulus arises from shared input but the neuronal circuit mechanisms that result in these noise correlations are not fully understood. Here we tested in the visual system if correlated variability in mid-level area V4 of visual cortex is altered following extensive lesions of primary visual cortex (V1). To this end we recorded longitudinally the neuronal correlations in area V4 of two behaving macaque monkeys before and after a V1 lesion while the monkeys fixated a grey screen. We found that the correlations of neuronal activity survived the lesions in both monkeys. In one monkey, the corre

SUBMITTER: Shapcott KA 

PROVIDER: S-EPMC5056506 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature