Effects of visual input on standing balance control when back-carrying external loads

2010 ◽  
Author(s):  
Xingda Qu ◽  
Xinyao Hu
Keyword(s):  
Balance Control ◽  
Visual Input ◽  
Standing Balance ◽  
External Loads

Balance control deficits in individuals with a transtibial amputation with and without visual input

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Gabriel Moisan ◽  
Ludovic Miramand ◽  
Hananeh Younesian ◽  
Katia Turcot
Keyword(s):  
Balance Control ◽  
Visual Input ◽  
Transtibial Amputation

scholarly journals Dynamical Analysis of Standing Balance Control on Sloped Surfaces in Individuals with Lumbar Disc Herniation

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jinping Li ◽  
Yang Zhang ◽  
Shasha Song ◽  
Ying Hou ◽  
Yigen Hong ◽  
...  
Keyword(s):  
Lumbar Disc Herniation ◽  
Disc Herniation ◽  
Balance Control ◽  
Lumbar Disc ◽  
Standing Balance ◽  
Dynamical Analysis

scholarly journals Vestibular contribution to balance control in the medial gastrocnemius and soleus

2016 ◽  
Vol 115 (3) ◽  
pp. 1289-1297 ◽  
Author(s):  
Christopher J. Dakin ◽  
Martin E. Héroux ◽  
Billy L. Luu ◽  
John Timothy Inglis ◽  
Jean-Sébastien Blouin
Keyword(s):  
Surface Electromyography ◽  
Balance Control ◽  
Motor Units ◽  
Vestibular Stimulation ◽  
Standing Balance ◽  
Medial Gastrocnemius ◽  
Functional Roles ◽  
Discharge Behavior ◽  
Balance Corrections ◽  
Biphasic Responses

The soleus (Sol) and medial gastrocnemius (mGas) muscles have different patterns of activity during standing balance and may have distinct functional roles. Using surface electromyography we previously observed larger responses to galvanic vestibular stimulation (GVS) in the mGas compared with the Sol muscle. However, it is unclear whether this difference is an artifact that reflects limitations associated with surface electromyography recordings or whether a compensatory balance response to a vestibular error signal activates the mGas to a greater extent than the Sol. In the present study, we compared the effect of GVS on the discharge behavior of 9 Sol and 21 mGas motor units from freely standing subjects. In both Sol and mGas motor units, vestibular stimulation induced biphasic responses in measures of discharge timing [11 ± 5.0 (mGas) and 5.6 ± 3.8 (Sol) counts relative to the sham (mean ± SD)], and frequency [0.86 ± 0.6 Hz (mGas), 0.34 ± 0.2 Hz (Sol) change relative to the sham]. Peak-to-trough response amplitudes were significantly larger in the mGas (62% in the probability-based measure and 160% in the frequency-based measure) compared with the Sol (multiple P < 0.05). Our results provide direct evidence that vestibular signals have a larger influence on the discharge activity of motor units in the mGas compared with the Sol. More tentatively, these results indicate the mGas plays a greater role in vestibular-driven balance corrections during standing balance.

scholarly journals Functional Electrical Stimulation of Peroneal Muscles on Balance in Healthy Females

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Zoe A. Bamber ◽  
Wei Sun ◽  
Rhea S. Menon ◽  
Patrick C. Wheeler ◽  
Ian D. Swain ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Functional Electrical Stimulation ◽  
Balance Control ◽  
Standing Balance ◽  
Treadmill Running ◽  
Eyes Closed ◽  
Significant Difference ◽  
Single Leg Stance ◽  
Eyes Open ◽  
Healthy Females

Balance improvement could contribute to ankle stability for the prevention of ankle sprains. Functional electrical stimulation (FES) is an effective way of augmenting muscle activity and improving balance. This study investigated the effect of FES of peroneal muscles on single-and double-leg balance. Fifteen healthy females (age=23.1±1.6 years, height=1.63±0.07 m, and weight=63.7±9.9 kg) performed single- and double-leg standing balance tests with eyes open and closed before and after 15-minute FES intervention during treadmill running at a comfortable, self-selected pace. FES of peroneal muscles was provided bilaterally, using an Odstock Dropped Foot Stimulator. The total excursion of the centre of pressure (COP) was calculated to assess the standing balance control ability. The total excursion of COP in single- and double-leg stance with eyes open reduced significantly after FES intervention by 14.7% (p<0.001) and 5.9% (p=0.031), respectively. The eyes-closed condition exhibited a 12.7% (p=0.002) reduction in single-leg stance but did not significantly change in double-leg stance (p>0.05). Limb preference did not account for balance postintervention. No significant difference in total excursion of COP was found between preferred and less preferred limbs with both visual conditions (p>0.05). FES of peroneal muscles improved standing balance control with eyes open in double-leg and single-leg stance and with eyes closed in double-leg stance. The improvements in balance control with FES treatment did not vary concerning limb preference.

scholarly journals Validity and reliability of standing balance control measurement on the left unilateral spatial neglect model

2021 ◽  
Vol 15 (3) ◽  
pp. 167-179
Author(s):  
Abdul C. Meidian ◽  
Song Yige ◽  
Syahmirza I. Lesmana ◽  
Kazu Amimoto
Keyword(s):  
Postural Balance ◽  
Balance Control ◽  
Standing Balance ◽  
Spatial Neglect ◽  
Validity And Reliability ◽  
Control Measurement ◽  
Unilateral Spatial Neglect ◽  
Head Mounted Display ◽  
The Right ◽  
Healthy Participants

BACKGROUND: The present study developed a head-mounted display with the visual direction of a web camera modified to the right as a left unilateral spatial neglect (USN) model with respect to postural balance control. AIM: We aimed to estimate the validity and reliability of center of pressure (CoP) measurements in static standing balance (SSB) and dynamic standing balance (DSB) of healthy participants were using the USN model and to examine whether this model's use influenced postural balance control. METHOD: A portable CoP force plate was used to quantify postural balance control in 64 healthy participants as the model. The CoP displacement of the non-USN and USN models in the medial-lateral (ML) and anterior-posterior (AP) planes, CoP length, and bilateral load ratio in SSB and DSB to the right (R) and left (L) were evaluated. RESULTS: Regression analysis indicated that most CoP measurements have excellent concurrent validity. Bland–Altman plots showed good agreement between the non-USN and USN models in the CoP measurements. Test-retest reliability estimation between two times measurements varied in the frontal and sagittal planes. A Comparison of the results demonstrated that the CoP-AP and CoP length changed (-1.40% and 7.67%, respectively) significantly in SSB (P<0.05). Moreover, the CoP-AP changed very significantly in DSB-R and DSB-L (-1.50% and 1.86%, respectively) in opposite directions (P<0.01) when the subjects performed as the model. CONCLUSION: CoP measurements are valid and reliable to quantify standing balance control in both non-USN and USN models that appear to modulate changes in postural adaptation and adjustment.

scholarly journals Elder Chinese Martial Art Practitioners Have Higher Radial Bone Strength, Hand-Grip Strength, and Better Standing Balance Control

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Shirley S. M. Fong ◽  
X. Guo ◽  
Alice P. M. Cheung ◽  
Alex T. L. Jo ◽  
Gary K. W. Lui ◽  
...  
Keyword(s):  
Grip Strength ◽  
Bone Strength ◽  
Distal Radius ◽  
Balance Control ◽  
Hand Grip Strength ◽  
Standing Balance ◽  
Martial Art ◽  
Hand Grip ◽  
Dominant Side ◽  
Radial Bone

This study explored the feasibility of using Ving Tsun (VT) martial art as a fall-prevention exercise for male seniors. We compared the radial bone strength, hand-grip strength, and standing balance control of senior VT practitioners and nonpractitioners under various sensory environments. Sixteen male VT practitioners (mean age ± SD: years) and 17 sex- and age-matched control adults (mean age ± SD: years) participated in the study. The bone strength of the distal radius, hand-grip strength, and standing balance control were assessed using an ultrasound bone sonometer, a Jamar dynamometer, and sensory organization test (SOT) on the NeuroCom Balance Master, respectively. A multivariate analysis of variance (MANOVA) was used to compare the outcome variables between the two groups. Results revealed that VT practitioners had significantly higher radial bone strength (-score) on the dominant side (), hand-grip strength (dominant side, ; nondominant side, ), and standing balance control (SOT composite equilibrium score, ) than the control participants. Male elder VT practitioners had higher radial bone strength, hand-grip strength, and better standing balance control than nonpractitioners. Our findings shed light on the use of VT exercise to prevent falls and fall-related fractures of the distal radius in male elders.

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