[Relationship between infraslow wave of ear plethysmogram and psychic tension--in comparison with skin potential reflex and heart rate (author's transl)].
An infraslow wave (ISP), with the cycle of 7-12 sec period, was observed in the plethysmogram on the ear, but was not observed on the finger or forehead. The purpose of this study was to examine whether ISP could be a new physiological indicator of psychic tension or not, by comparing it with the heart rate (HR) and skin potential reflex (SPR). In Exp. I, ISP, HR, and SPR were recorded during paired-associate learning. In Exp. II, those measures were monitered under 3 different levels of motivation: Task-orientation, ego-orientation, and punishment. ISP, HR, and SPR were shown to be reliable physiological indicators of psychic tension. It was suggested that those measures are related to different aspects of psychic tension.
D000293:Adolescent; D000328:Adult; D004431:Ear, External / Q000502:physiology*; D005712:Galvanic Skin Response; D006339:Heart Rate; D006801:Humans; D010991:Plethysmography; D013315:Stress, Psychological