Electrophysiological evidence favoring intracaudate axon collaterals of GABAergic caudate output neurons in the cat.

Stimulation of the entopeduncular nucleus in the cat was shown to evoke inhibitory responses with a short onset-latency in the caudate nucleus isolated from its afferents. These inhibitory responses are shown to be GABAergic, and some of them are suggested to be monosynaptic in nature.