The Effects of Polarization on Normal Subjects

Abstract

Lippold and Redfearn (1964) described the mental changes induced by the passage of small polarizing currents between two electrodes attached above the eyebrows and a single electrode on the right knee. When the forehead electrodes were positive with a total current flow of the order of 500 microamps, the mental changes consisted of an elevation of mood and an increased involvement in the environment. Forehead negative electrodes produced withdrawal and quietness. These observations were made on a group of hospitalized patients, the majority of whom were, or had been, mildly depressed. The authors state that “all would probably have been considered quite ‘normal’ by non-medical observers”.