STUDIES ON THE TEMPERATURE CHARACTERISTICS, BLOOD FLOW AND ACTIVITY IN NORMAL AND DENERVATED LIMBS OF THE DOG

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Abstract
Studies were carried out on dogs concerning the effects of denervation upon blood flow, temp. characteristics and contraction and relaxation times of the gastrocnemius muscle. The observations were made at various times after denervation, and the unoperated contralateral limb served as a control. Denervation was followed by an immediate increase in blood flow through the femoral artery, the flow returning to normal after several days of denervation. More extended periods of denervation resulted in subnormal blood flow values which appeared to parallel the extent of muscle atrophy. Denervated muscles exhibited a subnormal temp. and responded to diathermy with temp. increases greater than those observed in normal muscle. The twitch response of denervated muscle to induction shocks was slower than that of control muscle. This was due only in part to its subnormal temp. The subnormal temp., increased susceptibility to diathermy and the sluggish response of muscle at various times after denervation did not appear to be related to changes in blood flow.

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