Potentiation of "late" responses evoked in muscles during effort.

Autor:	Upton, A. R. M., McComas, A. J., Sica, R. E. P., Upton, A R, Sica, R E
Předmět:	MOTOR neurons SPINAL cord physiology SENSORY neurons ACTION potentials ELECTRIC stimulation EVOKED potentials (Electrophysiology) MUSCLE contraction NEURAL conduction REFLEXES PHYSIOLOGY
Zdroj:	Journal of Neurology, Neurosurgery & Psychiatry; Dec1971, Vol. 34 Issue 6, p699-711, 13p, 2 Diagrams, 7 Graphs
Abstrakt:	A study has been made of the effect of voluntary contraction on the `late' responses which can be recorded in muscles after indirect stimulation. Two late responses have been described of which the first was shown to consist mainly of a potentiated H-reflex. The potentiation of this wave was greatest in the abductor pollicis brevis muscle and depended largely on `direct' descending pathways to motoneurones. In addition, a later evoked muscle response appeared during effort; the nature of this wave was uncertain. Simple formulae have been devised to express the excitability of motoneurones to inputs from muscle nerves during effort. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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