[Organization of the receptive fields of the superior colliculus neurons of the squirrel Sciurus vulgaris].
Studies have been made on the reaction of single neurons of the superior colliculus to stationary and moving visual stimuli in immobilized squirrels. The main bulk of collicular units (59%) is not directionally selective, 11%--exhibit high directional selectivity and 30%--were found to be relatively selective. Most of the cells (85%) "prefer" high speed of stimulus motion. Optimal speed for these neurons is equal to 30--100 degree/sec. Testing by a stationary light spot (0.5degree in diameter), reveals different structure of the receptive fields with various types of "on"-and "off"-inputs. Lateral inhibition was observed in the receptive fields with both uniform organization and separated "on" and "off" areas.
D000818:Animals; D001931:Brain Mapping; D009039:Motion Perception / Q000502:physiology*; D012589:Sciuridae / Q000502:physiology*; D013477:Superior Colliculi / Q000502:physiology*; D014794:Visual Fields; D014796:Visual Perception / Q000502:physiology*
Organizatsiia retseptivnykh poleĭ neĭronov verkhnikh bugrov chetverokholmiia u belki Sciurus vulgaris