Experimental Physiology
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Quarterly Journal of Experimental Physiology 26.1 pp 5-11
© The Physiological Society 1936
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THE ELECTROMYOGRAM OF THE STRYCHNINE TETANUS IN THE GASTROCNEMIUS OF THE FROG

D. H. Smyth 1

1 The Department of Physiology, Queen's University, Belfast

An electrical recording system for biological work is described, consisting of a valve amplifier and an oscillograph of the Blondell movingiron type.

The electromyogram of the strychnine tetanus in the gastrocnemius of the frog is described. It consists of groups of oscillations, the frequency of the groups depending on the temperature of the spinal cord, and the frequency of the oscillations depending on the temperature of the leg.

No evidence has been obtained of a rhythm which could be regarded as the rhythm of each discharge from the cord.

The end of each tetanus appears to be brought about by central rather than by peripheral fatigue.

I am indebted to Professor T. H. Milroy for his advice and criticism during this work.

Submitted on December 4, 1935






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Copyright © 1936 by the The Physiological Society.