EFFECT OF SKIN TEMPERATURE ON THE ABSOLUTE THRESHOLD FOR ELECTRICAL CURRENT,
ARMY MEDICAL RESEARCH LAB FORT KNOX KY
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The effect was investigated of raising skin temperature on the absolute threshold for alternating current. Raising skin temperature of the finger or forearm to as much as 45C had no effect on the threshold for electrical cutaneous stimulation. The variation of pressure and mechanical vibration thresholds with skin temperature is a peripheral rather than central effect. Electrical current applied to the skin affects nerves directly without requiring transduction by a chemical or other process at the receptor. Cutaneous stimulation for signaling purposes should utilize electrical current rather than mechanical vibration inasmuch as sensitivity for the latter is markedly affected by skin temperature variations.
- Anatomy and Physiology