Abstract
After section of the rami communicantes in frogs, the muscles supplied by these nerves showed a 40% increase in lactic acid, a 34% increase in glycogen and an 18% decrease in lactacidogen. The lactic acid content of muscles on the operated side was also higher even when the aorta was tied off immediately after the operation. After injections of caffein leading to rigor the lactic acid content of muscles without sympathetic innervation was 50% greater than that of normal muscles. After large injections of urea the lactic acid content of the muscles was 8-10 times normal; in muscles without the rami communicantes there was a further increase of 44% in the lactic acid.

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