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Residual Vestibulo-Ocular Reflex Result in Better Functional Outcomes in Bilateral Vestibulopathy
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Ji Eun Choi, Gwanghui Ryu, Young Sang Cho, Won Ho Chung
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Res Vestib Sci. 2014;13(4):89-95.
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 Abstract
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- Background
and Objectives: The patients with bilateral vestibulopathy (BV) suffer
from unsteadiness and oscillopsia, and despite of appropriate rehabilitation,
permanent disability is inevitable. However, the level of functional outcomes
could be influenced by whether there is residual vestibulo-ocular reflex (VOR)
or not. Under the hypothesis that residual VOR function could result in better
performances, we tried to compare in functional outcomes between complete and
incomplete BV. Materials and Methods: Fifty patients who have been diagnosed
with BV in our institution were retrospectively reviewed retrospectively between
2008 and 2012. We classified them into complete BV group (n=19) and
incomplete BV (n=31) group according to the presence of residual VOR. Among
them, 31 patients responded to telephone survey (6 in complete group and 25
in incomplete group). The survey includes 5 categories such as the subjective
dizziness restriction on daily life, oscillopsia, unsteadiness and depression. Each
score ranged from 0 to 4 and patients were asked twice in different time period.
Results
There was no difference in etiology between complete and incomplete
group. Incomplete group showed significant improvement in dizziness, restriction
on daily life, oscillopsia and unsteadiness compared to complete group. Among
5 catergories, dizziness score was significantly improved in incomplete group
(each mean improved sore±standard deviation; dizziness 1.84±0.83, oscillopsia
0.44±0.64, unsteadiness 1±1.09, depression 0.24±0.86 restriction on daily life
1.16±0.97). Conclusion: The presence of residual VOR function had better
functional outcomes in bilateral vestibulopathy.
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