[Orientational selectivity and space-frequency characteristics of the receptive fields of occipital cortex neurons in the cat].

Spatial-frequency characteristics and orientation selectivity of the visual cortex neurons are studied in nonanesthetized cats. Gratings presented visually in a preferable orientation and proper spatial frequency evoked the largest responses. All other grating orientations evoked either small excitatory or even inhibitory responses. The largest inhibitory responses were observed when grating orientation was orthogonal to the preferable one. This inhibition depended on the grating spatial frequencies.