Visual control of human stance on a narrow and soft support surface

Title:

Visual control of human stance on a narrow and soft support surface

Creator:

Križková, M., Hlavačka, F., and Gatev, P.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:673db415-fc16-4ce6-8339-5ee070ace785
uuid:673db415-fc16-4ce6-8339-5ee070ace785

Subject:

visual feedback, posture control, and afferent control of stance

Type:

article, model:article, and TEXT

Description:

The influence of additional visual feedback (VF) on stance control was studied under conditions of changed afferent information from the foot sole and ankle joint due to different support surfaces. The changes of body sway amplitudes were analyzed and their frequency spectrum was established. The effect of visual feedback on the amplitude and frequency characteristics of human stance was manifested as: a) a decrease of the mean amplitude of body sway during visual feedback, corresponding to the decrease of power spectrum density (PSD) of stabilograms in the frequency range below 0.05 Hz, b) an increase of mean velocity of body sway corresponding to the increase of PSD of stabilograms in the frequency range of 0.4-1.5 Hz. The results showed that the improvement of the upright stance by additional visual feedback is mainly mediated through activation of postural muscles at the ankle level, or ankle strategy. The stabilization effect of VF on stance control is slight or negligible if the performance part in ankle joint (narrow support) was reduced.

Language:

English

Rights:

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

Source:

Physiological research | 1993 Volume:42 | Number:4

Harvested from:

CDK

Metadata only:

false