Responses of single units in the monkey superior colliculus to stationary flashing stimuli

Experimental Brain Research
J Moors, A J Vendrik

Abstract

1. Responses of pan-directional cells in the superficial layers of the superior colliculus in paralysed anaesthetized rhesus monkeys to stationary flashing stimuli have been studied. 2. The receptive field centre response is always of the transient excitatory on-off type, while the surround response is transient inhibitory both at light-on and at light-off. The receptive field centres are circular or slightly elliptical. The average size of the receptive field centres is much larger than that of retinal ganglion cells. All units except those in the far temporal periphery receive binocular input. In each unit the on and off responses have the same latency times. With increasing stimulus area, the latency time at light-on and at light-off first decreases and then remains constant. In most units the number of spikes in the burst at light-on and at light-off first increases, reaches a maximum and then decreases with increasing stimulus area. This decrease demonstrates the presence of an inhibitory surround. 3. A model of spatial and temporal properties of centre and surround mechanisms is tested. Addition of excitatory centre input and inhibitory surround input, which have different spatial and temporal properties, determines the o...Continue Reading

Citations

Feb 20, 1984·Brain Research·C K Peck
Feb 17, 1999·Proceedings of the National Academy of Sciences of the United States of America·J S MorrisR J Dolan
Feb 5, 2010·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Shreesh P MysoreEric I Knudsen
Nov 12, 2014·PloS One·Lauren E Grattan, Paul W Glimcher
Aug 17, 2016·The European Journal of Neuroscience·Masatoshi Kasai, Tadashi Isa
Feb 24, 2018·The Journal of Comparative Neurology·Kacie DoughertyAlexander Maier

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