Study of transcutaneous electrical potentials hairy and non-hairy areas of the face in adult males

Transcutaneous voltage potentials were recorded form points in the face of 30 healthy adult males. 240 points in the beard area and another 240 points in the adjacent non-hairy areas were studied. Potentials recorded from all these surface points-stratum corneum-were electronegative with respect to the dermis. Potentials in the hairy areas were found to be significantly lower than those in the non-hairy areas. This finding confirms earlier reports and excludes other factors, thus attributing the lower potential to the presence of hair