Postural Sway in Adults and Elderly Individuals During Local Vibratory Stimulation of the Somatosensory System

Ito, Tadashi; Sakai, Yoshihito; Nishio, Reiya; Itô, Yôhei; Yamazaki, Kazunori; Morita, Yoshifumi

doi:10.1007/s42399-020-00313-0

Cited by 6 publications

(12 citation statements)

References 44 publications

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“…In order to evaluate postural sway during proprioceptive inputs to the muscle spindles, the response frequency ranging from 56 to 100 Hz was analyzed. For information regarding proprioceptive dominance, RPW was calculated as follows: RPW [%] = (RMS GS )/(RMS GS + RMS LM ) × 100), where RMS GS and RMS LM are the root mean square of the COP displacement in the anteroposterior direction during GS and LM vibrations, respectively [ 6 , 28 , 34 , 35 ]. RMS was calculated as follows:

where n is the number of data series; Y * Dur (n) is the CoP in the anteroposterior direction in the duration section (Dur-section); Y * Pre is the mean value of CoP in the anteroposterior direction in the pre-sectiion (Pre-section); the subscript “*” is used to distinguish the stimulation body locations, namely, the GS or LM.…”

Section: Methodsmentioning

confidence: 99%

“…Each application required 30 s; this time was divided into the first 15 s and last 15 s to form the pre-section and duration section, respectively. In the duration section, the vibratory stimulus was applied to the GS or LM of the participant with his/her eyes closed [ 6 , 19 , 27 , 28 , 34 , 35 ]. The number of repetitions of stimulation was two, and the stimulation was given to GS and LM once for 15 s. Therefore, the total stimulation time was 30 s. In addition, the participants rested on a chair once for 60 s between measurements.…”

Section: Methodsmentioning

confidence: 99%

“…The number of repetitions of stimulation was two, and the stimulation was given to GS and LM once for 15 s. Therefore, the total stimulation time was 30 s. In addition, the participants rested on a chair once for 60 s between measurements. In previous studies, the task has been performed once because there was an influence of getting used to the postural sway test [ 6 , 19 , 20 , 21 , 27 , 28 , 34 , 35 ]. Therefore, in this study, the task was performed once as well.…”

Section: Methodsmentioning

confidence: 99%

“…In order to evaluate postural sway during proprioceptive inputs to the muscle spindles, the response frequency ranging from 56 to 100 Hz was analyzed. For information regarding proprioceptive dominance, RPW was calculated as follows: RPW [%] = (RMSGS)/(RMSGS + RMSLM) × 100), where RMSGS and RMSLM are the root mean square of the COP displacement in the anteroposterior direction during GS and LM vibrations, respectively [6,28,34,35]. RMS was calculated as follows:…”

Section: Postural Control Assessmentmentioning

confidence: 99%

“…Postural task analyses have shown that healthy young adults and older patients depend on proprioceptive inputs from the trunk and lower leg regions [ 23 , 24 , 25 , 26 , 27 ]. A previous study identified age-induced alterations in muscle spindles by investigating the differences in the postural control strategies of the ankle and hip between young adults and older adults [ 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

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Postural Sway in Older Patients with Sagittal Imbalance and Young Adults during Local Vibratory Proprioceptive Stimulation

et al. 2021

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This study aimed to assess differences in somatosensory control strategies between older patients with sagittal imbalance and young adults during postural tasks. The center of pressure displacement in 27 older patients with sagittal imbalance and 27 young adults was determined upon standing blindfolded on a balance board. Vibratory stimulation at 56 to 100 Hz was applied bilaterally to the gastrocnemius and soleus muscles (GS) and lumbar multifidus to evaluate the contributions of proprioceptive signals to postural control. Data of older patients and young adults were compared using the Mann–Whitney U-test or independent sample t-tests. Compared with the young adults, the older patients were significantly more reliant on the GS (p < 0.005) for their postural control and showed a higher relative proprioceptive weighting ratio (RPW) (p = 0.038). The postural strategy adopted by the older patients depended on the level of proprioceptive stimulation applied to the GS, and the postural control strategy of the ankle correlated with RPW. Overall, this study identifies RPW as a novel measure of postural strategy in older patients with sagittal imbalance and provides an understanding of strategies used to maintain balance, which may assist in developing preventative measures to reduce the risk of falls.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…In order to evaluate postural sway during proprioceptive inputs to the muscle spindles, the response frequency ranging from 56 to 100 Hz was analyzed. For information regarding proprioceptive dominance, RPW was calculated as follows: RPW [%] = (RMSGS)/(RMSGS + RMSLM) × 100), where RMSGS and RMSLM are the root mean square of the COP displacement in the anteroposterior direction during GS and LM vibrations, respectively [6,28,34,35]. RMS was calculated as follows:…”

Section: Postural Control Assessmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Postural Sway in Older Patients with Sagittal Imbalance and Young Adults during Local Vibratory Proprioceptive Stimulation

et al. 2021

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What are the temporal and physical characteristics of locally applied vibration that modulate balance in older adults? - A systematic review of the literature

Holmes,

Vindigni,

Moreland

et al. 2024

Gait & Posture

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Effects of unilateral neck muscle vibration on standing postural orientation and spatial perception in healthy subjects based on stimulus duration and simultaneous stimulation of trunk muscles

Hirosawa

Takehara²,

Moriyama

et al. 2023

PLoS ONE

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Neck muscle vibration (NMV) influences proprioceptive sensations and modulates standing postural orientation and spatial perception. However, the effects of NMV in healthy participants would vary based on the influence of stimulus duration and combination with trunk muscle vibration. Therefore, this study with a cross-over design clarified these effects. Twenty-four healthy participants (mean age, 25.7±3.7 years) were enrolled. To assess standing postural orientation, standing center-of-pressure (COP) measurements were recorded on a COP platform, starting with closed eyes and then with open eyes. The mean mediolateral (ML) and anteroposterior (AP) position [mm] of COP and other parameters were calculated. To assess spatial perception, subjective straight ahead (SSA) measurements were recorded, wherein participants were instructed to point and project the position of the manubrium of sternum on the touch panel using their right index finger with their eyes closed. Measurements were taken before and after four conditions: no vibration (control), left NMV for 30 s, left NMV for 10 min, and left NMV and left lumbar back vibration for 10 min. Vibratory stimulation was performed with the eyes closed at 80 Hz. The measurements under the four conditions were conducted with random cross-over and 5-min resting period between the conditions. COP and SSA values were subtracted before and after each condition for standardized variation and compared. NMV combined with trunk muscle vibration for 10 min resulted in significant deviations of the ML-COP toward the stimulation side and AP-COP toward the anterior side compared to the control condition with closed eyes. SSA showed no significant differences. These findings suggest that NMV-induced nervous system modulation would be amplified by proprioceptive sensory input to trunk muscles. Therefore, this method could provide a new option for clinical trials on postural orientation using NMV. SSA based on proprioceptive sensation may not be biased without visual illusions.

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Postural Sway in Adults and Elderly Individuals During Local Vibratory Stimulation of the Somatosensory System

Cited by 6 publications

References 44 publications

Postural Sway in Older Patients with Sagittal Imbalance and Young Adults during Local Vibratory Proprioceptive Stimulation

Postural Sway in Older Patients with Sagittal Imbalance and Young Adults during Local Vibratory Proprioceptive Stimulation

What are the temporal and physical characteristics of locally applied vibration that modulate balance in older adults? - A systematic review of the literature

Effects of unilateral neck muscle vibration on standing postural orientation and spatial perception in healthy subjects based on stimulus duration and simultaneous stimulation of trunk muscles

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