Sensed Movement to Sinusoidal Angular and Electrical Stimulation

Abstract

Three types of stimulation were presented to blindfolded Ss seated in a chair: sinusoidal right-left mechanical rotation; bilateral sinusoidal electrical current via electrodes over the mastoid processes; and simultaneous mechanical and electrical stimulation. Ss signalled perceived right or left rotation by pressing right or left response buttons, respectively. Sensations of rotation were reported to electrical stimulation alone, and appeared to interact in a simple summative manner with sensations produced by mechanical rotation. A biteboard reduced but did not eliminate the electrical effects.