Microvibration on the scalp as a diagnostic aid in orthostatic dysregulation.

IGARASHI, K. Microvibration on the Scalp as a Diagnostic Aid in Orthostatic Dysregulation. Tohoku J. exp. Med., 1971, 105 (1), 11-17 The microvibration (MV) on the scalp of the parietal region in 23 healthy subjects and 16 patients with orthostatic dysregulation (O.D.) ranging from 9 to 11 years of age was recorded at rest in the supine position on the horizontally flat table and in the 20° head up tilt position on the tilted flat table. The amplitude of the dominant vibration in the MV was smaller in O.D. patients than in healthy subjects in 20° head up tilt position. This finding suggests that a decrease in cardiac output by tilting from the supine position to the 20° head up tilt position is significantly larger in O.D. patients than in healthy subjects. orthostatic dysregula tion; microvibration; cardiac output