CEREBELLAR INTERPOSITUS NUCLEUS MODULATES NEURONAL-ACTIVITY OF LATERAL HYPOTHALAMIC AREA

EFFECTS of stimulating the cerebellar interpositus nucleus (IN) on the neuronal activity of lateral hypothalamic area (LHA) were first obser ved in the cat. The results showed that (1) IN stimulation could elici t inhibitory, excitatory, inhibitory-excitatory and excitatory-inhibit ory responses from LHA neurones, with a majority of inhibitory respons es (46.9%); (2) the responsive latencies of LHA neurones to IN stimula tion ranged from 5 to 45 ms, while most (83.6%) showed a short latency of < 15 ms; (3) of 67 LHA neurones which responded to the IN stimulat ion, 42 (62.7%) cells were identified to be glucose-sensitive neurones . These results suggest that IN may be involved in the role of LHA mod ulating food intake behaviour, as well as other non-somatic functions.