[Dynamic characteristics of motor reactions induced by motor cortex stimulation of unanesthetized cats].
Temporal characteristics of muscle contraction evoked by bipolar macrostimulation of cat motor cortex were studied in chronic experiments. Cortically induced flexion of the contralateral hindlimb was recorded isometrically and in some cases isotonically. Latency of muscle contraction exceeded 100 ms when low frequency (100-150/s) stimulation was applied. An increase in the stimulation frequency and intensity led to the shortening of the latency: under "optimal" parameters of the stimulation the minimal values were 30-35 ms. Time constant of the contraction increment was 50-80 ms whereas that of the contraction decrement after stimulation cessation reached 150-300 ms. The results obtained are considered from the view point of automatic regulation theory.
D000818:Animals; D001931:Brain Mapping; D002415:Cats; D004558:Electric Stimulation; D009044:Motor Cortex / Q000502:physiology*; D009068:Movement; D009119:Muscle Contraction; D011930:Reaction Time / Q000502:physiology; D013997:Time Factors
Dinamicheskie kharakteristiki dvigatel'nykh reaktisiĭ, vyzyvaemykh u nenarkotizirovannykh koshek stimuliatsieĭ motornoĭ kory.