Human postural responses to different frequency vibrations of lower leg muscles

Title:

Human postural responses to different frequency vibrations of lower leg muscles

Creator:

Polónyová, A. and František Hlavačka

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:3704905e-c6dc-4bc3-a0f6-04d1d451177f
uuid:3704905e-c6dc-4bc3-a0f6-04d1d451177f
issn:0862-8408

Subject:

Fyziologie člověka a srovnávací fyziologie, muži, svaly dolních končetin, men, lower limb muscles, postural responses, vibration frequency, lower leg muscles, 14, and 612

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

We analyzed human postural responses to muscle vibration applied at four different frequencies to lower leg muscles, the lateral gastrocnemius (GA) or tibialis anterior (TA) muscles. The muscle vibrations induced changes in postural orientation characterized by the center of pressure (CoP) on the force platform surface on which the subjects were standing. Unilateral vibratory stimulation of TA induced body leaning forward and in the direction of the stimulated leg. Unilateral vibration of GA muscles induced body tilting backwards and in the opposite direction of the stimulated leg. The time course of postural responses was similar and started within 1 s after the onset of vibration by a gradual body tilt. When a new slope of the body position was reached, oscillations of body alignment occurred. When the vibrations were discontinued, this was followed by rapid recovery of the initial body position. The relationship between the magnitude of the postural response and frequency of vibration differed between TA and GA. While the magnitude of postural responses to TA vibration increased approximately linearly in the 60-100 Hz range of vibration frequency, the magnitude of response to GA vibration increased linearly only at lower frequencies of 40-60 Hz. The direction of body tilt induced by muscle vibration did not depend on the vibration frequency., A. Polónyová, F. Hlavačka., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 2001 Volume:50 | Number:4

Harvested from:

CDK

Metadata only:

false