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Reliability and laterality of the soleus H-reflex following galvanic vestibular stimulation in healthy individuals.
Nakamura, Junji; Okada, Yohei; Shiozaki, Tomoyuki; Tanaka, Hiroaki; Ueta, Kozo; Ikuno, Koki; Morioka, Shu; Shomoto, Koji.
Affiliation
  • Nakamura J; Department of Rehabilitation Medicine, Nishiyamato Rehabilitation Hospital, Nara, Japan; Graduate School of Health Sciences, Kio University, Nara, Japan. Electronic address: H1181002@kio.ac.jp.
  • Okada Y; Graduate School of Health Sciences, Kio University, Nara, Japan; Neurorehabilitation Research Center of Kio University, Nara, Japan.
  • Shiozaki T; Department of Otolaryngology-Head and Neck Surgery, Nara Medical University, Nara, Japan.
  • Tanaka H; Department of Rehabilitation Medicine, Baba Memorial Hospital, Osaka, Japan.
  • Ueta K; Neurorehabilitation Research Center of Kio University, Nara, Japan; Department of Rehabilitation Medicine, Hoshigaoka Medical Center, Osaka, Japan.
  • Ikuno K; Department of Rehabilitation Medicine, Nishiyamato Rehabilitation Hospital, Nara, Japan; Graduate School of Health Sciences, Kio University, Nara, Japan.
  • Morioka S; Graduate School of Health Sciences, Kio University, Nara, Japan; Neurorehabilitation Research Center of Kio University, Nara, Japan.
  • Shomoto K; Graduate School of Health Sciences, Kio University, Nara, Japan.
Neurosci Lett ; 755: 135910, 2021 06 11.
Article in En | MEDLINE | ID: mdl-33910060
ABSTRACT
The vestibulospinal tract (VST) plays an important role in the control of the ipsilateral antigravity muscles, and the balance of left and right VST excitability is important in human postural control. A method for measuring VST excitability is the application of galvanic vestibular stimulation (GVS) before tibial nerve stimulation that evokes the soleus H-reflex; the change rate of the H-reflex amplitude is then evaluated. Assessments of VST excitability and the left and right balance could be useful when determining the pathology for interventions in postural control impairments. However, the reliability and laterality of this assessment have not been clarified, nor has its relationship to postural control. We investigated the reliability, laterality and standing postural control in relation to the degree of facilitation of the H-reflex following GVS in 15 healthy adults. The assessments were performed in two sessions, one each for the left- and right-sides, in random order. The inter-session reliability of the short-interval assessments of an increase in the H-reflex following GVS on both sides were sufficient. The degree of H-reflex facilitation by GVS showed no significant difference between the left- and right-sides in any session. There was a moderate positive correlation between the mediolateral position of the center of pressure in the eyes-closed standing on foam condition and the left/right ratio of the degree of increased H-reflex in the first-session. We concluded that this method for evaluating the increase in the soleus H-reflex following GVS has high inter-session reliability in the short-interval that did not differ between sides.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Muscle, Skeletal / Spinocerebellar Tracts / Electromyography / Postural Balance / Galvanic Skin Response / H-Reflex Limits: Adult / Female / Humans / Male Language: En Journal: Neurosci Lett Year: 2021 Document type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Muscle, Skeletal / Spinocerebellar Tracts / Electromyography / Postural Balance / Galvanic Skin Response / H-Reflex Limits: Adult / Female / Humans / Male Language: En Journal: Neurosci Lett Year: 2021 Document type: Article