Why the study?
Does microvibration on the scalp differ between healthy subjects and patients with orthostatic dysregulation during tilt testing?
Does microvibration on the scalp differ between healthy subjects and patients with orthostatic dysregulation during tilt testing?
Microvibration on the scalp shows a significantly greater decrease during tilt in children with orthostatic dysregulation compared to healthy controls, suggesting its potential as a diagnostic aid.
Scalp microvibration decrease during tilt was associated with orthostatic dysregulation; hypothesis-generating and requires prospective validation before clinical use.
1) The MV on the scalp of the parietal region in 23 healthy subjects and 16 O. D. patients ranging from 9 to 11 years of age was recorded at rest in the supine position. 2) The rate in percentage of the value in the tilt position (b) to that at rest in the supine position (a) was calculated in every subject. The average of the b/a ratio was 93% in the healthy subjects and 78% in the O. D. patients. A statistically significant difference was observed between these two groups. 3) The above results might be considered mainly due to a transitory greater decrease in cardiac output in O. D. patients in 20° head-up tilt position from the supine position at rest than that in healthy subjects. 4) The other factors affecting the results may be considered to be an increase in peripheral vascular resistance, the state of emotion, the sensitivity of the subject, etc. 5) The study of the MV may give an important clue to the hemodynamics in O. D.. 6) A statistically significant difference in the average dominant amplitude in the MV between the healthy subjects and the O. D. patients was obtained. Therefore the MV can be used as a diagnostic aid in O. D.
No takes yet. Share an insight, caveat, or question.
Katsuro Igarashi (1971) studied this question.