[Neuronal analysis of the rubro-cerebellar projection in the cat]

Antidromic activation of red nucleus neurons evoked by stimulation of cerebellar nucleus interpositus was studied in nembutalized cats. Neuronal composition of the rubro-cerebellar projection was shown to be determined by two types of red nucleus cells. One is represented by rubro-spinal neurons with axon collaterals projecting to cerebellar nucleus interpositus and affected by synaptic influences from the cerebral cortex and cerebellum. The other component of rubro-cerebellar projection is represented by nonrubro-spinal neurons having no synaptic inputs from the cerebral cortex and cerebellum.