Stationary auditory white noise improves postural control in healthy adults: A novel study on head-shaking

2021 ◽  
pp. 1-14
Author(s):  
Midya Mohammadi ◽  
Zakaria Enayati ◽  
Moslem Shaabani ◽  
Mohsen Vahedi
Keyword(s):  
Postural Control ◽  
White Noise ◽  
Postural Sway ◽  
Head Rotation ◽  
Healthy Adults ◽  
The Body ◽  
Force Platform ◽  
Eyes Closed ◽  
Eyes Open ◽  
Head Shake

BACKGROUND: Auditory cues might play a role in postural control. OBJECTIVE: The primary aim of this study was to investigate the association between white noise and head-shake (HS) related changes in postural sway. METHODS: Fifty healthy adults underwent Synapsys Posturography System (SPS) evaluation. The posturography (PG) evaluation consisted of two protocols: sensory organization test (SOT) and SOT with head-shake (HS) (HS-SOT). The standard SOT protocol of SPS involves a battery of six postural conditions. In the current study, participants underwent only four SOT conditions. The participants were asked to stand barefoot on the SPS platform (static platform and foam). The SOT standing conditions were as follow: (1) firm surface (force platform only) with eyes open (SOT1); (2) firm surface with eyes closed (SOT2); (3) foam surface (which was positioned on the force platform) with eyes open (SOT4); and (4) foam surface with eyes closed (SOT5). For the HS-SOT protocol, we asked the participants to move their heads left and right (i.e., yaw head rotation) in the mentioned SOT conditions. Each postural condition was 10 seconds long. Both SOT and HS-SOT postural conditions were conducted across the two hearing modes of silence and noise. To achieve our aims, comparison of sway parameters between SOT and HS-SOT, and between hearing modes were considered. RESULTS: White noise was associated with a reduction in postural sway. The reduction observed in sway area, sway amplitude, and sway frequency. Moreover, HS significantly increased postural sway in all HS-SOT conditions compared to their SOT equivalents (i.e., HS-SOT1 compared to SOT1, etc.). The presence of white noise was associated with a decrease in the HS-related increase in postural sway. CONCLUSIONS: Considering the results, this study adds to the body of literature suggesting that white noise contributes to postural control, and the implications of this for rehabilitation need to be further investigated.

Reliability of Force-Platform Measures of Postural Sway and Expertise-Related Differences

2011 ◽  
Vol 20 (4) ◽  
pp. 442-456 ◽  
Author(s):  
Zohreh Meshkati ◽  
Mehdi Namazizadeh ◽  
Mahyar Salavati ◽  
Masood Mazaheri
Keyword(s):  
Outcome Measures ◽  
Postural Sway ◽  
Center Of Pressure ◽  
Intraclass Correlation ◽  
Specific Property ◽  
Force Platform ◽  
Quiet Standing ◽  
Eyes Closed ◽  
Before And After ◽  
Eyes Open

Context:Although reliability is a population-specific property, few studies have investigated the measurement error associated with force-platform parameters in athletic populations.Objective:To investigate the skill-related differences between athletes and nonathletes in reliability of center-of-pressure (COP) summary measures under eyes-open (EO) and eyes-closed (EC) conditions.Design:Test–retest reliability study.Setting:COP was recorded during double-leg quiet standing on a Kistler force platform before and after a fatiguing treadmill exercise, with EO and EC.Participants:31 male participants including 15 athletes practiced in karate and 16 nonathletes.Main Outcome Measures:Standard deviation (SD) of amplitude, phase-plane portrait, SD of velocity, mean total velocity, and area were calculated from 30-s COP data. Intraclass correlation coefficient (ICC), standard error of measurement, and coefficient of variation (CV) were used as estimates of reliability and precision.Results:Higher ICCs were found for COP measures in the athlete (compared with the nonathlete) group, postfatigued (compared with prefatigued) condition, and EC (compared with EO) tests. CVs smaller than 15% were obtained for most of the COP measures. SD of velocity in the anteroposterior direction showed the highest reliability in most conditions.Conclusions:Tests with EC and to a lesser extent tests performed in the athlete group and in the postfatigued condition showed better reliability.

scholarly journals Haptic contact with a walking dog improves human balance during a quiet tandem task with various levels of difficulty

2021 ◽  
Vol 15 (3) ◽  
pp. 237-249
Author(s):  
Eliane Mauerberg-deCastro ◽  
Gabriella A. Figueiredo ◽  
Thayna P. Iasi ◽  
Debra F. Campbell ◽  
Renato Moraes
Keyword(s):  
Postural Control ◽  
Task Difficulty ◽  
Force Platform ◽  
Support Surface ◽  
Haptic Information ◽  
Dog Walking ◽  
Eyes Closed ◽  
Pulling Forces ◽  
Eyes Open ◽  
Human Balance

BACKGROUND: When a person walks a dog, information from variables of their own postural control is integrated with haptic information from the dog’s movements (e.g., direction, speed of movement, pulling forces). AIM: We examined how haptic information provided through contact with a moving endpoint (here, the leash of a dog walking on a treadmill) influenced an individual’s postural control during a quiet tandem standing task with and without restricted vision and under various elevations of the support surface (increased task difficulty levels). METHOD: Adults performed a 30-second quiet tandem stance task on a force platform while holding a leash attached to a dog who walked on a treadmill parallel to the force platform. Conditions included: haptic contact (dog and no-dog), vision constraint (eyes open, EO, and eyes closed, EC), and surfaces (4 heights). RESULTS: Interaction between haptic condition and vision showed that contact with the dog leash reduced root mean square (RMS) and mean sway speed (MSS). RMS showed that the highest surface had the greatest rate of sway reduction during haptic contact with EC, and an increase with EO. CONCLUSION: The dog’s movements were used as a haptic reference to aid balance when eyes were closed. In this condition, contact with the dog’s leash reduced the extent of sway variability on the higher surfaces.

scholarly journals Correlation between body weight and postural control in healthy individuals using sway meter

2019 ◽  
Vol 16 (2) ◽  
pp. 36-41
Author(s):  
Tharani G ◽  
Vedha Varshini M G ◽  
Senthil Nathan C V ◽  
Mohan Kumar G ◽  
Kamatchi K
Keyword(s):  
Body Weight ◽  
Postural Control ◽  
Body Mass ◽  
Strong Correlation ◽  
Daily Living ◽  
Postural Sway ◽  
The Body ◽  
Healthy Individuals ◽  
Eyes Closed ◽  
Anterior Posterior

BACKGROUND: Postural control is critical for ensuring a safety activity of daily living. Individuals with poor stability are more prone to fall while doing activities of daily living. A certain level of sway is essentially present due to small perturbation within the body during shifting body weight from one to other foot, breathing, etc. The purpose of this study was to analyze the correlation between body mass and postural control in normal, lean and obese individual. AIMS: to analyze the correlation between body mass and postural control in healthy individuals using sway meter. MATERIALS AND METHODS: This is an observational study done with 75 participants. Both male and female healthy individuals between 18-23 years were included in this study. Individuals with any musculoskeletal injuries, neurological conditions, peripheral artery disease and pregnant women were excluded from the study. BMI of each participant was calculated and assigned into three groups. Group A-lean, group B-normal and group C-obese. Postural control was analyzed for each group by using sway meter; level of postural sway was compared between groups A, B C. RESULTS: On comparing mean values of groups A, B and C there was a positive association and strong correlation between body mass index and postural control with eye open and eye closed in anterior, posterior and postural sway towards left between the groups at (P 0.05). However, there was a negative association and weak correlation between BMI and postural control with eye open eye closed in postural sway towards right between the groups at (P 0.05). CONCLUSIONS: This study reveals that there is strong correlation between BMI and postural control. Subjects in eyes closed and eyes opened conditions showed sway in anterior, posterior and left directions but there was less sway towards right side direction.

The contribution of hearing to normal balance

2012 ◽  
Vol 126 (10) ◽  
pp. 984-988 ◽  
Author(s):  
R G Kanegaonkar ◽  
K Amin ◽  
M Clarke
Keyword(s):  
Postural Control ◽  
Significant Influence ◽  
Postural Sway ◽  
Normal Subjects ◽  
Nintendo Wii ◽  
Sensory Inputs ◽  
Eyes Closed ◽  
Ambient Sound ◽  
Eyes Open ◽  
Balance Board

AbstractIntroduction:Normal balance relies on three sensory inputs: vision, proprioception and the peripheral vestibular system. This study assessed hearing change and postural control in normal subjects.Materials and methods:Postural control in 20 normal volunteers was assessed using a Nintendo Wii gaming console and balance board. Each subject was tested standing upright for 30 seconds in a clinic room and a soundproof room with their eyes open, eyes closed, whilst standing on and off foam, and with and without ear defenders.Results:There was significantly more postural sway in the following subjects: those standing with their eyes closed vs those with eyes open (normal room, p = 0.0002; soundproof room, p = 0.0164); those standing on foam with eyes open vs those standing normally with eyes open (in both rooms; p < 0.05); those standing with eyes open in a soundproof room vs a normal room (p = 0.0164); and those standing on foam in a soundproof room with eyes open and wearing ear defenders vs those in the same circumstances but without ear defenders.Conclusion:Our results suggest that this method provides a simple, inexpensive tool for assessing static postural control. Whilst it is recognised that visual input and proprioception play a central role in maintaining posture, our findings suggest that ambient sound and hearing may also have a significant influence.

scholarly journals The effect of age, sex and a firm-textured surface on postural control

2021 ◽  
Author(s):  
Francesco Palazzo ◽  
Alessandra Nardi ◽  
Niloofar Lamouchideli ◽  
Alfio Caronti ◽  
Anas Alashram ◽  
...  
Keyword(s):  
Postural Control ◽  
Postural Sway ◽  
Center Of Pressure ◽  
Sensory System ◽  
The Body ◽  
Quiet Standing ◽  
Textured Surface ◽  
Textured Surfaces ◽  
Experimental Conditions ◽  
Eyes Open

AbstractIn previous studies, the influence of plantar sensation has been examined using various textured surfaces with different stiffness materials to assess static balance. This study investigated the effects of a Firm Textured Surface (FTS) along with age and sex-related influences on postural control under different visual conditions. Forty subjects (20 elderly, 10 males, mean age 68.30, 10 females, mean age 68.00, and 20 young people, 10 males, mean age 25.45, 10 females, mean age 27.30) participated in this study maintained a quiet standing on FTS, foam and firm surfaces with eyes open and closed. The center of pressure displacement (CoPDISP), CoP velocity (CoPVEL), and sway velocity of the CoP in anteroposterior (AP) and mediolateral (ML) direction (VA/P and VM/L) were measured. FTS was associated with lower postural sway measures in both the groups with eyes open and closed. However, the foam surface showed the worst results in all postural parameters under all experimental conditions. Separate four-way ANOVAs were applied to each dependent variable. The main effects of surface (p < 0.0001), vision (p < 0.0001) and age (p < 0.0001 for CoPDISP, CoPVEL and VA/P; p = 0.0003 for VM/L) were significant in each of the four fitted models. Sex was never significant, either as a main effect or an interaction with other experimental factors. Eyes open were able to reduce the negative effects of the foam surfaces but without vision the proprioceptive sensory system cues of the body state become more important for maintaining balance. A good stimulation with rigid texture should be considered as relief to reduce the physiological-related decline of afferent information with age.

Effects of Balance Training on Postural Stability

2002 ◽  
Vol 46 (13) ◽  
pp. 1237-1240
Author(s):  
Jennifer M. Schmit ◽  
Deanna I. Rejacques ◽  
Michael A. Riley
Keyword(s):  
Postural Control ◽  
Postural Sway ◽  
Balance Training ◽  
Control Group ◽  
Significant Group ◽  
Eyes Closed ◽  
Eyes Open ◽  
Group 2 ◽  
Main Effects ◽  
The Relationship

The present study is designed to address the relationship between postural sway and balance training. We compared postural sway in a group of trained dancers to a group of physically fit, untrained participants (control group) in order to assess enhanced postural control with balance training, particularly under challenging balance conditions. We varied the difficulty of postural control by using two surface conditions (rigid surface, foam surface) and two visual conditions (eyes open, eyes closed), factorially combined. The data were evaluated using 1-between (group) × 2-within (vision and surface) analyses of variance (ANOVA). The three dependent variables were the standard deviation of the COP time series in the anterior-posterior (AP) and medial-lateral (ML) axes, and the COP path length. Significant main effects were found for surface and vision and the surface*vision interaction in all conditions. Significant group differences were found in the AP and ML axes. The results of this study indicate that balance training enhances the control of posture. Thus, it may be useful to provide balance training to workers who must operate under conditions that threaten balance.

scholarly journals Balance assessment in healthy children and adolescents aged 6–18 years based on six tests collected on AMTI AccuSway force platform

2020 ◽  
Vol 22 (2) ◽  
Author(s):  
Krzysztof Graff ◽  
Ewa Szczerbik ◽  
Małgorzata Kalinowska ◽  
Maciej Jaworski ◽  
Małgorzata Syczewska
Keyword(s):  
Children And Adolescents ◽  
Sagittal Plane ◽  
The Body ◽  
Force Platform ◽  
Quiet Standing ◽  
Healthy Children ◽  
Eyes Closed ◽  
Balance Tests ◽  
Eyes Open ◽  
Visual Conditions

Purpose: The aim of the study was to compare the results of six balance tests collected on AMTI AccuSway Plus ACS force platform between healthy female and male children and adolescents. We also searched for possible correlation of the balance measures with subjects’ age. Methods: 228 healthy 6- to 18-year-old subjects (111 boys and 117 girls) participated in the study. Six balance tests were performed with the use of AMTI AccuSway Plus ACS platform: quiet standing for 30s, maximal voluntary sways of the body in the sagittal plane (anterior-posterior – AP test) for 30 s, and in the frontal plane (left-right – ML test) for 30s. All tests were performed in two conditions: eyes open and eyes closed. Results: During quiet standing with eyes open, most balance measures were lower in girls (p < 0.05). In AP and ML tests with eyes open, a few balance parameters were different between boys and girls (p < 0.05). In quiet standing, AP and ML tests with eyes closed, there were no between-gender differences (p > 0.05). In quiet standing with eyes open and closed most balance parameters were negatively correlated with age (p < 0.05). Conclusions: Quiet standing postural sway characteristics depended on gender under normal visual conditions and it was similar in boys and girls under visual deprivation conditions. The vision was differently used by females and males in balance tasks. Static postural stability improved with age regardless of visual conditions.

Changes in Posture Following a Single Session of Long-Duration Water Immersion

2018 ◽  
Vol 34 (6) ◽  
pp. 435-441
Author(s):  
Stephen M. Glass ◽  
Christopher K. Rhea ◽  
Matthew W. Wittstein ◽  
Scott E. Ross ◽  
John P. Florian ◽  
...  
Keyword(s):  
Postural Control ◽  
Postural Sway ◽  
Center Of Pressure ◽  
Water Immersion ◽  
Specific Pattern ◽  
Eyes Closed ◽  
Stable Surface ◽  
Visual Inputs ◽  
Long Duration ◽  
Eyes Open

Transitioning between different sensory environments is known to affect sensorimotor function and postural control. Water immersion presents a novel environmental stimulus common to many professional and recreational pursuits, but is not well-studied with regard to its sensorimotor effects upon transitioning back to land. The authors investigated the effects of long-duration water immersion on terrestrial postural control outcomes in veteran divers. Eleven healthy men completed a 6-hour thermoneutral pool dive (4.57 m) breathing diver air. Center of pressure was observed before and 15 minutes after the dive under 4 conditions: (1) eyes open/stable surface (Open-Stable); (2) eyes open/foam surface (Open-Foam); (3) eyes closed/stable surface (Closed-Stable); and (4) eyes closed/foam surface (Closed-Foam). Postdive decreases in postural sway were observed in all testing conditions except for Open-Stable. The specific pattern of center of pressure changes in the postdive window is consistent with (1) a stiffening/overregulation of the ankle strategy during Open-Foam, Closed-Stable, and Closed-Foam or (2) acute upweighting of vestibular input along with downweighting of somatosensory, proprioceptive, and visual inputs. Thus, our findings suggest that postimmersion decreases in postural sway may have been driven by changes in weighting of sensory inputs and associated changes in balance strategy following adaptation to the aquatic environment.

scholarly journals The effects of ankle Kinesiotaping on postural control in healthy taekwondo athletes

2021 ◽  
Vol 25 (6) ◽  
pp. 345-352
Author(s):  
Yasemin Bayraktar ◽  
Nurtekin Erkmen ◽  
Yagmur Kocaoglu ◽  
Bayram Sönmez Ünüvar
Keyword(s):  
Postural Control ◽  
Postural Sway ◽  
Stability Index ◽  
Wilcoxon Test ◽  
Balance System ◽  
Eyes Closed ◽  
Tibiofibular Ligament ◽  
Significant Difference ◽  
Eyes Open ◽  
Biodex Balance System

Background and Study Aim. Although Kinesiotape is widely used by athletes, information about its effect is unclear. Its effect on postural control might directly affect an athlete's performance. In this study, it is aimed to find out whether ankle Kinesiotaping in taekwondo athletes affects postural control. Material and Methods. Twenty-four healthy university students – taekwondo athletes (12 females, 12 males) were included in the study voluntarily (Age 21.00 ± 1.53 years; height 173.33 ± 7.29 cm; body weight 63.41 ± 9.41 kg). Kinesiotape was carried out to the dominant ankle of the participants. Kinesiotape was applied supportively to peroneus longus, peroneus brevis, and tibiofibular ligament. All participants were taken to postural control measurements twice with Kinesiotape (KT) and without KT. Postural control was measured using the Biodex Balance System with eyes open (EO) and eyes closed (EC). Overall Stability Index (OSI), anterior-posterior sway (AP) and medio-lateral sway (ML) scores were used in the evaluation of postural control. Wilcoxon test was used to compare balance scores under EO condition, and the t-test was used for dependent groups to compare balance scores under EC condition. Results. In EO condition, no significant difference was found between OSI, AP, and ML scores of the taekwondo athletes with KT and without KT (p > 0.05). In EC condition, no significant difference was found between OSI, AP, and ML scores of male taekwondo athletes with KT and without KT (p > 0.05). It was found that Kinesiotape in EC condition decreased OSI and AP sway scores in female taekwondo athletes (p < 0.05). Conclusions. It was determined that ankle Kinesiotaping of taekwondo athletes did not change the postural balance in EO condition. In EC condition it did not change the postural sway of male taekwondo athletes, but it improved the postural control performances of female taekwondo athletes.

Unsupported Eyes Closed Sitting and Quiet Standing Share Postural Control Strategies in Healthy Individuals

Motor Control ◽  
2015 ◽  
Vol 19 (1) ◽  
pp. 10-24 ◽  
Author(s):  
Murielle Grangeon ◽  
Cindy Gauthier ◽  
Cyril Duclos ◽  
Jean-Francois Lemay ◽  
Dany Gagnon
Keyword(s):  
Postural Control ◽  
Center Of Pressure ◽  
Control Strategies ◽  
Standing Position ◽  
The Body ◽  
Quiet Standing ◽  
Healthy Individuals ◽  
Eyes Closed ◽  
Eyes Open ◽  
Almost All

The study aimed to (1) compare postural stability between sitting and standing in healthy individuals and (2) define center-of-pressure (COP) measures during sitting that could also explain standing stability. Fourteen healthy individuals randomly maintained (1) two short-sitting positions with eyes open or closed, with or without hand support, and (2) one standing position with eyes open with both upper limbs resting alongside the body. Thirty-six COP measures based on time and frequency series were computed. Greater COP displacement and velocity along with lower frequency measures were found for almost all directional components during standing compared with both sitting positions. The velocity, 95% confidence ellipse area, and centroidal frequency were found to be correlated between unsupported sitting and standing. Despite evidenced differences between sitting and standing, similarities in postural control were highlighted when sitting stability was the most challenging. These findings support further investigation between dynamic sitting and standing balance.

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