Reflection of the spatial characteristics of an acoustic signal in the activity of caudate nucleus neurons.

Studies were performed on five dogs. Chronic experimental conditions were used to study the responses of individual neurons in the caudate nucleus to the spatial characteristics of an acoustic signal. The results showed that 92% of sound stimulus-responsive neurons in the head of the caudate nucleus in dogs generated asymmetrical responses to contra- and ipsilateral monaural stimulation, with contralateral stimulation being more effective. In 50% of caudate nucleus neurons, simultaneous stimulation of both sound inputs was more effective than contralateral stimulation. A total of 77% of sound-responsive caudate neurons demonstrated sensitivity to changes in the magnitude and sign of the interaural delay.