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KMID : 0371620020170020107
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Journal of Wonkwang Medical Science
2002 Volume.17 No. 2 p.107 ~ p.122
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Neural plasticity for restoration of postural control following unilateral labyrinthectomy
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Park Byung-Rim
Kim Min-Sun
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Abstract
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Vestibular system located in the inner ear induces vestibuloocular, vestibulospinal and vestibuloautonomic reflexes by head movement. Peripheral vestibular receptors detect head movement and their afferent signals are transmitted to the vestibular nuclei for inducing vestibular reflexes. Loss of unilateral vestibular function, as a result of unilateral labyrinthectomy (UL), transaction of the Ⅷ nerve, or vestibular neuritis, causes an imbalance in resting activity between the bilateral vestibular nuclei which results in vestibular symptoms including nausea, vomiting, vertigo, spontaneous nystagmus, head oscillation, and head deviation. However, over a period of a few days or weeks following UL, some of these symptoms abate in a process of behavioral recovery known as "vestibular compensation", which is an adequate model for lesion-induced neural plasticity. In this review, the mechanism for vestibular compensation following unilateral labyrinthectomy is discussed.
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KEYWORD
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Unilateral labyrinthectomy, Vestibular compensation, Vestibular nuclei, Cerebellum
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