[Characteristics of fibers of the fastigio-spinal tract of cats].

Cord dorsum potentials (CDP) and fibre activity in the upper cervical spinal cord evoked by electrical stimulation of the contralateral fastigial nucleus of the cerebellum were recorded in cats anesthetized with chloralose and nembutal. Conduction velocity of fastigio-spinal fibres was evaluated by dividing the distance between definite cervical segments into the difference between latencies of CDP in the same segments. Fastigio-spinal fibres reach the level of C5 in ventral and ventrolateral funicles; their conduction velocities range from 20.7 to 67.3 m/s.