[Spectrum analysis of stabilograms with special reference to changes following whole body vibration].
The location of the body's gravicenter in the horizontal plane was measured by means of a force platform. The 4 male subjects stood upright with eyes closed. Power-density spectra of the frontal and sagittal stabilograms were estimated. Repeated investigations made it possible to assess intraindividual variability and to evaluate significant interindividual differences. The power spectral density was not altered by a controlled sitting posture observed for 30 min. Low-frequency whole-body vibration with an exposure time of 30 min and a permissible level according to the "fatigue decreased proficiency boundary" (International Standard ISO 2631) induced a significant increase of the power spectral density below 0.25 Hz and a decrease above this frequency. The results indicate that the power density spectral analysis of stabilograms is a suitable method for evaluating a biological effect of vibration.
D006801:Humans; D004856:Postural Balance; D014724:Vestibular Function Tests; D014732:Vibration
Zur Spektralanalyse von Stabilogrammen unter besonderer Berücksichtigung von Veränderungen nach Ganzkörpervibration.