[Phase-dependent changes in the posterior root potentials during real locomotion in rats]

Dorsal root potentials (DRP) were studied during two kinds of the real locomotion (swimming and stepping) of rats. Two negative DRP waves were observed in one locomotor cycle. One wave coincided with stance on extension, while the other one--with swing phase. Dependence between the DRP amplitude and intensity of afferent input during the real locomotion and passive movements of hind limbs was established. It is concluded that wave-like changes of DRP in the real locomotion are mainly due to the influences from peripheral afferents.