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Arch Phys Med Rehabil. 2005 Jul;86(7):1401-3.

Audio-biofeedback improves balance in patients with bilateral vestibular loss.

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  • 1Department of Electronics, Computer Science and Systems, University of Bologna, Bologna, Italy.

Abstract

OBJECTIVE:

To evaluate the effectiveness of an audio-biofeedback (ABF) system for improving balance in patients with bilateral vestibular loss (BVL).

DESIGN:

Before-after trial.

SETTING:

University balance disorders laboratory.

PARTICIPANTS:

Nine subjects with BVL and 9 unaffected subjects as controls.

INTERVENTION:

Trunk acceleration ABF while standing on foam with eyes closed.

MAIN OUTCOME MEASURE:

Balance stability was evaluated according to the following parameters: the root mean square of (1) the center of pressure (COP) displacements and of (2) the trunk accelerations; the COP bandwidth; the time spent by the participant within +/-1 degrees threshold from their baseline COP position; and the mean accelerations of the trunk while the participant was swaying outside this +/-1 degrees threshold.

RESULTS:

Participants with BVL had significantly larger postural sway than did unaffected participants. Those with BVL, while using ABF, decreased sway area by 23%+/-4.9%, decreased trunk accelerations by 46%+/-9.9%, and increased time spent within +/-1 degrees sway threshold by 195%+/-34.6%.

CONCLUSIONS:

ABF improved stance stability of participants with BVL by increasing the amount of postural corrections.

PMID:
16003671
[PubMed - indexed for MEDLINE]
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