Gaze stabilization exercises derive sensory reweighting of vestibular for postural control

Ueta, Yusuke; Matsugi, Akiyoshi; Oku, Kazuomi; Okuno, Kojiro; Tamaru, Yoshiki; Nomura, Shohei; Tanaka, Hiroaki; Douchi, Shinya; Mori, Nobuhiko

doi:10.1589/jpts.29.1494

Cited by 16 publications

(8 citation statements)

References 13 publications

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“…During sports activity, head movements are estimated and head moves in various intensities and frequencies21 ) , and these head movements induced by sports activity may effect the adaptation of vestibular system and enhance the central pre-programming. Evidence suggests that healthy older adults involved in low energy physical activities had better vestibular sensitivity based on vestibular function test compared with healthy older adults without physical activities11, 12, 22 ) and vestibular function could be improved by simple head and eye movements in health young adults4, 23,24,25 ) .…”

Section: Discussionmentioning

confidence: 99%

Differences in postural stability and dynamic visual acuity among healthy young adults in relation to sports activity: a cross sectional study

et al. 2019

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[Purpose] Sports activity has been shown to improve postural stability and vestibular function in healthy older adults. The hypothesis was that healthy young adults undertaking sports activity will also have better postural stability and vestibular function compared with healthy young adults who do not undertake sports activity. The purpose of this study was to investigate the differences in postural stability and vestibular function between healthy young adults who undertake sports activity and those who do not undertake such activity. [Participants and Methods] Thirty-nine healthy young adults were recruited and divided into sports and non-sports groups on the basis of their response to a questionnaire concerning regular participation in sports activities over the past 12 months. In both groups, postural stability was measured during quiet standing and standing during head rotation, and dynamic visual acuity was assessed during head rotation. [Results] The results showed significant differences in postural stability during head rotation and dynamic visual acuity between the two groups, whereas no significant differences were found in postural stability during quiet standing. [Conclusion] The results suggest that healthy young adults who undertake sports activity have better postural stability during head rotation and better dynamic visual acuity. The causal effect of these differences is not clear and further investigation is warranted.

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Section: Discussionmentioning

confidence: 99%

Differences in postural stability and dynamic visual acuity among healthy young adults in relation to sports activity: a cross sectional study

et al. 2019

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“…Aging degrades sensory functions or declines the ability of sensory integrations, which further induces losing balance and falling in the elderly. Postural control involves the visual, vestibular, and somatosensory systems [1], and there could be reweighting between each system depending on external stimulations [2]. Auditory noise sound has been documented to improve postural control [3,4], and act as additional information to postural regulation [5].…”

Section: Introductionmentioning

confidence: 99%

Sound Effects on Standing Postural Strategies in the Elderly via Frequency Analysis Approach

Lee

Chen

et al. 2020

Applied Sciences

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Sound and sound frequency could improve postural sway in the elderly. The power spectrum intervals of the center of pressure (COP) displacement are associated with different postural regulations, which could be revealed by frequency analysis. The aim of the study was to investigate the effects of sound on dual-tasking postural control and conduct frequency analysis to distinguish postural regulations in the elderly. Fifteen young and 15 older healthy participants were instructed to stand on a force platform and performed the Purdue Pegboard test while hearing 50 dB sounds with sound frequencies of 250 Hz, 1000 Hz, 4000 Hz, or no sound. The total excursion, velocity, sway area, and power spectrum of low-, medium-, and high-frequency bands of the COP displacement were calculated in the anterior–posterior and medial–lateral directions. The percentages of low-frequency and medium-frequency bands in both directions were significantly different between with and without sound conditions, but not affected by sound frequency. Older adults showed a smaller percentage of low-frequency, larger percentage of medium-frequency, larger total COP excursion, and faster velocity in the medial–lateral direction. The outcome of the study supports the frequency analysis approach in evaluating sound effects on postural strategies in dual-tasking and reveals older adults utilize vestibular regulation as the primary postural strategy when the dual-task required visual attention.

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“…The vestibuloocular reflex contributes to eye movements during head movements [5]. In young adults, GSEs have been shown to modulate the excitability of vestibular reflexes after only 1 min of GSE [6, 7]. Based on previous reports, it was hypothesized that eye and head movements can be changed in the second and subsequent GSE compared to the first 1 min GSE.…”

Section: Introductionmentioning

confidence: 99%

Cerebellum-mediated trainability of eye and head movements for dynamic gazing

et al. 2019

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ObjectiveTo investigate whether gaze stabilization exercises (GSEs) improve eye and head movements and whether low-frequency cerebellar repetitive transcranial magnetic stimulation (rTMS) inhibits GSE trainability.Methods25 healthy adults (real rTMS, n = 12; sham rTMS, n = 13) were recruited. Real or sham rTMS was performed for 15 min (1 Hz, 900 stimulations). The center of the butterfly coil was set 1 cm below the inion in the real rTMS. Following stimulation, 10 trials of 1 min of a GSE were conducted at 1 min intervals. In the GSE, the subjects were instructed to stand upright and horizontally rotate their heads according to a beeping sound corresponding to 2 Hz and with a gaze point ahead of them. Electrooculograms were used to estimate the horizontal gaze direction of the right eye, and gyroscopic measurements were performed to estimate the horizontal head angular velocity during the GSE trials. The percentage change from the first trial of motion range of the eye and head was calculated for each measurement. The percent change of the eye/head range ratio was calculated to assess the synchronous changes of the eye and head movements as the exercise increased.ResultsBayesian two-way analysis of variance showed that cerebellar rTMS affected the eye motion range and eye/head range ratio. A post hoc comparison (Bayesian t-test) showed evidence that the eye motion range and eye/head range ratio were reduced in the fifth, sixth, and seventh trials compared with the first trial sham stimulation condition.ConclusionsGSEs can modulate eye movements with respect to head movements, and the cerebellum may be associated with eye–head coordination trainability for dynamic gazing during head movements.

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Gaze stabilization exercises derive sensory reweighting of vestibular for postural control

Cited by 16 publications

References 13 publications

Differences in postural stability and dynamic visual acuity among healthy young adults in relation to sports activity: a cross sectional study

Differences in postural stability and dynamic visual acuity among healthy young adults in relation to sports activity: a cross sectional study

Sound Effects on Standing Postural Strategies in the Elderly via Frequency Analysis Approach

Cerebellum-mediated trainability of eye and head movements for dynamic gazing

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