Changes of skin potential level and of skin resistance level corresponding to lasting motion discomfort.

The qualitative correspondence between degree of motion discomfort and electrodermal activity was investigated. Skin potential level (SPL) and skin resistance level (SRL) in the arousal sweat area and the thermal sweat area were recorded. In order to induce motion discomfort, Coriolis stimulation and/or horizontal body rotation were provided by using a rotatory chair. The degree of discomfort was evaluated according to reports by the subjects. It was observed that SPL depolarized in the arousal sweat area as well as in the thermal sweat area and SRL lowered in the thermal sweat area coincidentally with lasting motion discomfort. SPL showed better correspondence the recovery period from the motion discomfort.