[Variations in the membrane potentials of motor neurons during the generation of scratching].
The activity of motoneurons of the ankle flexor and extensor muscles was recorded intracellularly during fictitious scratching in decerebrate curarized cats. Before the beginning of rhythmical oscillation a large depolarization and tonic discharge were observed in flexor motoneurons, while the membrane potential of extensor ones did not change. When the rhythmical generation began, a short periodic hyperpolarization and corresponding pause in the discharge lasting for the extensor phase of the cycle appeared in flexor motoneurons. In extensor motoneurons a periodic depolarization increasing in the course of the flexor phase was observed; a maximal depolarization occurred in the extensor phase in which a short burst of spikes was generated.
D000818:Animals; D002415:Cats; D003655:Decerebrate State / Q000503:physiopathology; D008564:Membrane Potentials; D009043:Motor Activity / Q000502:physiology*; D009046:Motor Neurons / Q000502:physiology*; D013116:Spinal Cord / Q000502:physiology
O kolebaniiakh membrannogo potentsiala motoneĭronov pri generatsii chesaniia.