Effects of linear versus sigmoid coding of visual or audio biofeedback for the control of upright stance.
Journal article, 2006
Although both visual and audio biofeedback (BF) systems for postural control can reduce sway during stance, a direct comparison between the two systems has never been done. Further, comparing different coding designs of audio and visual BF may help in elucidating how BF information is integrated in the control of posture, and may improve knowledge for the design of innovative BF systems for postural control. The purpose of this paper is to compare the effects of linear versus sigmoid coding of trunk acceleration for audio and visual BF on postural sway in a group of eight, healthy subjects while standing on a foam surface. Results showed that sigmoid-coded audio BF reduced sway acceleration more than did a linear-coded audio BF, whereas a linear-coded visual BF reduced sway acceleration more than a sigmoid-coded visual BF. In addition, audio BF had larger effects on reducing center of pressure (COP) displacement whereas visual BF had larger effects on reducing trunk sway. These results suggest that audio and visual BF for postural control benefit from different types of sensory coding and each type of BF may encourage a different type of postural sway strategy.
Models
Auditory Perception
Posture
Skeletal
Psychology
Linear Models
Visual Perception
Humans
physiology
physiology
Female
Male
physiology
physiology
Muscle
Computer Simulation
Nonlinear Dynamics
physiology
Biological
Postural Balance
innervation
Biofeedback
physiology
Author
Marco Dozza
Chalmers, Vehicle and Traffic Safety Centre at Chalmers (SAFER)
Chalmers, Applied Mechanics, Vehicle Safety
Lorenzo Chiari
Frantisek Hlavacka
Angelo Cappello
Fay B Horak
IEEE Transactions on Neural Systems and Rehabilitation Engineering
1534-4320 (ISSN) 1558-0210 (eISSN)
Vol. 14 4 505-12Subject Categories
Medical Engineering
Other Medical and Health Sciences
Other Natural Sciences
DOI
10.1109/TNSRE.2006.886732
PubMed
17190042