Abstract
Action potentials were recorded from single cells of the red nucleus; they were evoked by antidromic stimulation of the rubrospinal tract and by stimulation of the contralateral nucleus interpositus of the cerebellum in monkeys. It was demonstrated that axons go to the spinal cord not only from the large cells of the caudal pole but also from the neurons of the micro cellular part of the red nucleus. The speed of conduction along axons of rubrospinal neurons of monkeys ranges from 17.4–108.8 m/ sec (predominantly 60–90 m/sec). Experiments with stimulation of the cerebellar nucleus interpositus pointed to the existence of a monosynaptic interposito-rubral connection in monkeys.
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