This report introduced quantitative tests for evaluating abnormalities in mental sweating obtained from 40 control and 45 diabetic subjects.Emotional and mental sweating appears on the palms (H) and soles (F). A capacitive humid sensor was used to measure mental sweat secreted from eccrine glands on the palms and soles.
Tests consisted of hand grip (GRIP), mental calculation (CALC), compulsory inspiration (INS), and sole-scratching procedures (Babinski maneuver: BAB) to stimulate mental sweating from eccrine sweat glands.
Mental sweating in the palms and soles of control subjects were in the following sequence of most to least-GRIP, CAL, BAB, and INS-and in diabetics from GRIP, CAL, INS, to BAB.
There were significant differences in the total amount of mental sweating stimulated in the index fingers and big toea only for solescratching.This was significantly diminished in diabetic compared to control subjects.
There was a significant correlation between H-INS and both motor nerve conduction velocity (MCV) and sensory nerve conduction velocity (SCV) in median nerves of diabetic patients (p<0.05), and a significant reverse correlation between both H-CAL and F-CAL and F-latency (p<0.05).
Measuring mental sweating may thus be useful in evaluating diabetic autonomic neuropathy in peripheral regions such as the palms and soles.
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