[Comparative analysis of the background activity of adjacent neurons in microsegments of the visual cortex of wakeful cats].

By the shape of autocorrelation histograms six types of background activity have been defined in neurones of the field 18 of the visual cortex in non-anaesthetized non-immobilized cats. In the spike activity of neurones recorded with a high amplitude of action potentials, burst discharges and periods of activity inhibition were observed more often than in neurones recorded with a small amplitude. It is suggested that similarity of spike activity of neighbouring neurones observed in cortical microareas is due to similarity of afferent flows to these neurones.