Abstract
Extracellularly recorded discharges of units in the inferior colliculus of the Flaxedilized chinchila will be described. The two ears were stimulated independently so that interaural intensity and phase could be manipulated. Of those units encountered whose activity could controlled by acoustic stimuli below about 2 kHz, a large majority were found to be differentially responsive to alterations of interaural phase and intensity. The time patterns (histograms) in response to binaural stimulation showed characteristic alterations of excitation and inhibition similar to those which have been reported for neurons in the cat. The effect of interaural phase changes could be maximized by appropriate choice of interaural intensity differences.
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