The medial division of the superior olives usually recieves afferents from both cochlear nuclei via the trapezoid body which implies a biaural function. Studies shows that some of the cells in the medial superior olives depends on the time interval between the onset of stimulation at the two ears. Eg .a click to the right ear followed by a click to the left ear may evoke a response while the sequence left -right doesnot.
Since neurons located in the medial superior olive nucleus respond to differences in the time that a given stimulus reaches each of the ears, unilateral lesion may result in impairment of interaural time and level differences and sound localization.
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