ELECTROPHYSIOLOGIC CHARACTERISTICS AND INTERPRETATION OF SKIN POTENTIALS.

The relation of skin potential and endosomatic GSR to surface electrolytes reveals that the surface layurthermore, wide variations in surface potential induced by varying electrolyte concentrations have no effect on the GSR. Results are consistent with a base potential generated by two membranes in series-an outer one accessible to surface electrolytes but not participating in the GSR, an inner one inaccessible to surface media but responsible for the positive component of the GSR. Microelectrode studies show there is a third structure in parallel, the sweat gland, which has different electrical characteristics and produces negative endosomatic waves. The two endosomatic GSR components manifest stimulus response specificity and are apparently under independent neural control. Author