[Periodicity of corticospinal motor reactions of rat pups].
It has been demonstrated that at early stages of postnatal development of rats, corticospinal effects interact with spinal automatism. Epicortical stimulation at a frequency 0.5-1/s causes the onset of periodic motor activity during the first week of postnatal life; at later stages the same stimulation evokes periodically changing (with respect to their intensity) motor responses which follow the rhythm of stimulation. It is suggested that autogenic periodic processes in the spinal cord manifest themselves not only in periodic motor excitation, but in periodic changes of excitability as well.
D000375:Aging; D000818:Animals; D001332:Automatism / Q000503:physiopathology; D004558:Electric Stimulation; D004562:Electrocardiography; D006801:Humans; D009043:Motor Activity / Q000502:physiology*; D009044:Motor Cortex / Q000502:physiology*; D010507:Periodicity; D051381:Rats; D012018:Reflex / Q000502:physiology; D013116:Spinal Cord / Q000502:physiology*
Periodichnost' kortikospinal'nykh motornykh reaktsiĭ u krysiat.