[Interaction of automatic centers].

Evoked responses in the cerebellar cortex during stimulation of posterior hypothalamus in anesthetized cats revealed activating as well as inhibitory influences on the cerebellar cortex. The mamillary med. nucleus seems to have monosynaptic as well as polysynaptic connections. The principal connections of the posterior hypothalamic nuclei are polysynaptic. The supramamillary nucleus has both oligosynaptic (to neocerebellar cortex) and polysynaptic (to vermal cortex) connections.