[Effect of cold adaptation on the resting membrane potential of muscle fibers].
In experiments on rats the membrane potential of single muscle fibers in fast (m. gastrocnemius) and slow (m. soleus) muscles were measured in animals adapted to cold and in the control group. The dynamics of the membrane potential was studied also during the first 60 min after the sciatic nerve dissection. In cold adapted rats the membrane potential of slow muscle fibers was higher than in the control group, but in the fast muscle fibers there was no difference between the two groups of animals. The denervation of muscles resulted in a progressive increase in the membrane potential. This hyperpolarization seems to be the result of deprivation of the c. n. s. from the activating influence. The data suggest that cold adaptation affects mainly the slow muscle fibers.
D000222:Adaptation, Physiological; D000818:Animals; D002490:Central Nervous System / Q000502:physiology; D003080:Cold Temperature; D004734:Energy Metabolism; D008564:Membrane Potentials; D009121:Muscle Denervation; D009132:Muscles / Q000294:innervation / Q000502:physiology*; D009928:Organ Specificity; D051381:Rats
Vliianie adaptatsii k kholodu na membrannyĭ potentsial pokoia myshechnogo volokna.