[Depolarization of the primary afferents in stimulation of the brain stem structures of rats in ontogeny]

New data have presented concerning early development of supraspinal control of afferent impulsation to the central nervous system. Stimulation of the brain stem results in depolarization of the primary afferents and affects the level of depolarization caused by the evoked activity of segment afferents. Maturation of this mechanism takes place within first weeks of postnatal life.