Failure on the Foam Eyes Closed Test of Standing Balance Associated With Reduced Semicircular Canal Function in Healthy Older Adults.
Eric Anson, Robin T Bigelow, Stephanie Studenski and 2 others
PMID 29894381WHAT IT FOUND
People with lower horizontal semicircular canal function were less likely to pass standing on foam with eyes closed.
Ankle position sense and other inner ear tests were not related. The test may point to canal function, not all vestibular loss.
Key findings
01The balance task allowed up to three attempts to complete a 40 second trial; of 563 participants, 487 (86.5%) passed, and 404 were analysed.
02Each additional year of age was reported as 15% more likely to fall, and each 0.10 decrease in VOR gain was reported as an 8% increase in the odds of falling.
03Ankle proprioception threshold and otolith measures were not significant contributors to the odds of passing without losing balance.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study was cross-sectional, so it cannot show that vestibular or proprioceptive changes caused balance failure. Sensory tests were performed while participants were sitting or lying down, separately from standing, so the results do not reflect sensory reweighting during balance. Only horizontal semicircular canal function was tested with VOR gain, so vertical canal contributions were not assessed. VEMP responses were treated as present or absent rather than as continuous amplitudes, although testing continuous amplitudes did not change the relationship with passing. Ankle proprioception was measured behaviourally, not by a physiologic test such as somatosensory evoked potentials. The video head impulse test was insensitive to mild to moderate caloric asymmetries. Participants who needed assistance to stand from sitting or to walk were excluded, so the results do not apply to people who cannot stand or walk independently. The analysis included only participants who completed all sensory and balance tests, not everyone who attempted balance testing.
Declared interests
No author conflict of interest statement is included in the supplied text. The publication metadata lists NIH extramural research support.
The easy way to misread this
Do not use a failed foam eyes closed test as proof of vestibular loss. The study found only an association with lower horizontal semicircular canal VOR gain; ankle proprioception and otolith measures were not significant, and the design was cross-sectional.