Abstract
A few studies report on the swaying motion of the body in the sitting position; however, these studies have not evaluated the motion sickness induced by watching movies, taking conveyance, and others. This study aimed to analyze the stabilograms recorded while an individual was in the sitting position. This study included 7 healthy male subjects (age, 21-22 years). Stabilometry was performed in the sitting position 5 min before, 5, 10, ..., and 60 min after the alcoholic load; the alcoholic load causes a decrease in the cerebellar equilibrium function controlling the vestibulospinal reflex. Degree of suppression of the equilibrium function can be simulatively adjusted in proportion to the alcoholic intake. We analyzed the following parameters of the stabilograms of these subjects: the area of sway, total locus length, total locus length per unit area, and our proposed indices. We found that the significant changes of these sway values, caused by alcohol intake, in the sitting position were similar to those in the standing position.
