title: Spectral analysis of body sway.
abstract: The frequency spectrum of the center of gravity in normal subjects while standing was recorded by using a platform-strain gauge system and a digital computer. Individual differences of the spectral patterns resulted in the classification of three types. Averaged divisional frequency of each type was calculated in the range below 1 Hz in which the main change between the values with eyes open and those with eyes closed appeared as the frequency shift.
mesh_terms: D000293:Adolescent; D000328:Adult; D006112:Gravitation; D006801:Humans; D008722:Methods; D009068:Movement; D004856:Postural Balance; D011187:Posture; D013997:Time Factors