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KMID : 1197720160090010040
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대한파킨슨병 및 이상운동질환 학회지
2016 Volume.9 No. 1 p.40 ~ p.43
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Can Postural Instability Respond to Galvanic Vestibular Stimulation in Patients with Parkinson’s Disease?
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Kataoka Hiroshi
Okada Yohei
Kiriyama Takao
Kita Yorihiro
Morioka Shu
Shomoto Koji
Ueno Satoshi
Nakamura Junji
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Abstract
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Objective: Galvanic vestibular stimulation (GVS) activates the vestibular afferents, and these changes in vestibular input exert a strong influence on the subject’s posture or standing balance. In patients with Parkinson’s disease (PD), vestibular dysfunction might contribute to postural instability and gait disorders.
Methods: Current intensity was increased to 0.7 mA, and the current was applied to the patients for 20 minutes. To perform a sham stimulation, the current intensity was increased as described and then decreased to 0 mA over the course of 10 seconds. The patient’s status was recorded continuously for 20 minutes with the patient in the supine position.
Results: Three out of 5 patients diagnosed with PD with postural instability and/or abnormal axial posture showed a reduction in postural instability after GVS. The score for item 12 of the revised Unified Parkinson’s Disease Rating Scale part 3 was decreased in these patients.
Conclusions: The mechanism of postural instability is complex and not completely understood. In 2 out of the 5 patients, postural instability was not changed in response to GVS. Nonetheless, the GVS-induced change in postural instability for 3 patients in our study suggests that GVS might be a therapeutic option for postural instability.
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KEYWORD
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Parkinson, Galvanic vestibular stimulation, Vestibular stimulation, Postural instability, Vestibular dysfunction, Posture
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