Medial Superior-Olivary-Unit Response Patterns to Monaural and Binaural Clicks

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Abstract
Single units in the accessory nucleus of anesthetized cats, isolated with tungsten microelectrodes, show a delicate sensitivity to interaural time and intensity differences. A click delivered to one ear produces a response that may be inhibited by a click presented with some time difference to the opposite ear. When a response occasionally does occur during such inhibition, its latency is increased significantly. Both the amount of this shift and the occurrence of inhibition are dependent upon the interaural time difference. In one well-studied instance, when the interaural time difference was too large to produce inhibition, an increase in the intensity of the driving click produced effective inhibitory interaction. Monaural unit responses show such variations in latency to a click stimulus that, whenever the effects of time and intensity disparities are under investigation, time measurements should be made from N1 of each cochlea.

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