Gaze stabilization exercises derive sensory reweighting of vestibular for postural control.
Yusuke Ueta, Akiyoshi Matsugi, Kosuke Oku and 6 others
PMID 28931974WHAT IT FOUND
Five head-turning gaze exercises reduced sway on foam and increased the vestibular contribution to standing in 23 healthy adults; visual and somatosensory contribution did not change.
Key findings
01Center-of-pressure path length on foam rubber was significantly lower after gaze stabilization exercise than before.
02Center-of-pressure path length on firm ground with eyes open or closed did not differ significantly after gaze stabilization exercise.
03Vestibular sensory contribution was significantly different, while visual and somatosensory contributions were not; post-hoc testing showed a difference only between the pre and post10 measurements.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study included only 23 healthy young adults with no history of neurological disease, mean age 24.1 ± 1.6 years, so it does not show what happens in patients with balance or vestibular problems. There was no separate control group or sham exercise described; all measurements were before and after the same exercise. The outcomes were laboratory sway measures and calculated sensory contribution values during quiet standing, not walking, falls, symptoms, or function in daily life. The sensory contribution values are derived from sway path length formulas, so they are estimates of sensory weighting, not direct measurements of the vestibular, visual, or somatosensory systems. The authors discuss possible application to vestibular patients, older adults, and stroke patients, but the study did not test those groups.
The easy way to misread this
Do not conclude that gaze stabilization exercise improves balance in patients with vestibular dysfunction, older adults, or stroke. This study tested only 23 healthy young adults in quiet standing, with no control group, and the authors' suggestion for patients was not tested.