[New locomotor areas of the brain stem of the cat].

New sites in the brainstem eliciting treadmill locomotion have been revealed in decerebrated cats by means of electrical stimulation. These sites--cochlear nuclei, ventral spinocerebellar tract and resciform body which includes dorsal spinocerebellar tract--are located outside the known locomotor regions. It is suggested that the nonspecific afferent activation of the brainstem reticular formation during electrical stimulation of the mentioned sensory tracts is sufficient for the initiation of the treadmill locomotion.