Influence of different jaw positions on dynamic balance using Y‐balance test

Zafar, Hamayun; Alghadir, Ahmad H.; Iqbal, Zaheen A.; Iqbal, Amir; Anwer, Shahnawaz; Alnahdi, Ali H.

doi:10.1002/brb3.1507

Cited by 9 publications

(5 citation statements)

References 40 publications

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“…Dynamic balance : Y-balance test (YBT) was used to measure dynamic balance (Move2Perform, Evansville, IN, USA) [ 31 , 32 , 33 , 34 , 35 ]. It measures the reach distance in anterior, posteromedial, and posterolateral directions.…”

Section: Methodsmentioning

confidence: 99%

Effect of Chronic Ankle Sprain on Pain, Range of Motion, Proprioception, and Balance among Athletes

Alghadir

Iqbal

et al. 2020

IJERPH

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Background: Ankle sprains are common among physically active individuals, especially among athletes. Majority of those who suffer ankle sprains have residual symptoms including pain, episodes of giving way, compromised proprioception and neuromuscular control, and re-injury leading to chronic ankle instability. The aim of this study was to see the effect of chronic ankle sprain on pain, range of motion, proprioception, and, static and dynamic balance among athletes. Methods: A total of 80 athletes, aged 18 to 25 years, involved in track-and-field sports were invited to participate in this study. They were divided in two groups. Athletes with history of grade 1 or 2 ankle sprain on either side requiring medical care who reported at least three episodes of ankle giving way in past 12 months were included in group A. An equal number of healthy athletes without any history of ankle sprain or injury in the lower limbs in the past one year matched by sex, age, height, weight, and limb dominance, were included in group B (control). Outcome measures: Participant’s pain, range of motion, proprioception and balance (static and dynamic) was measured using visual analog scale, half circle goniometer, degree of foot position sense, single leg stance time and Y-balance test respectively. Results: Although there were no differences in the active ankle joint range of motion (p > 0.05) in comparison to the control group, athletes with chronic ankle sprain reported mild pain and statistically significant (p < 0.05) deficits in foot proprioception, static and dynamic balance. Conclusions: Deficits in foot proprioception, static and dynamic balance even one year after the ankle sprain could be the reason for limitations in the dynamic defense system of the joint that predisposes to recurrent injury and instability. It is essential to understand the normal clinical course and risk factors for athletes who sustain sprain before devising a long term comprehensive rehabilitation program that focuses on mechanical and functional insufficiencies in order to improve their functional performance and prevent the risk of recurrent sprain.

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Section: Methodsmentioning

confidence: 99%

Effect of Chronic Ankle Sprain on Pain, Range of Motion, Proprioception, and Balance among Athletes

Alghadir

Iqbal

et al. 2020

IJERPH

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“…Similarly, posture and gait control developed with the evolution of human beings (Stedman et al., 2004 ). A close link between body balance and head‐neck‐jaw position has been observed in healthy subjects (A. Alghadir et al., 2014 , 2017 ; A. H. Alghadir et al., 2015a ; Zafar, Alghadir, Iqbal, Iqbal, et al., 2019 ). Jaw clenching has also been shown to affect the maximal voluntary contraction of limb muscles (A. H. Alghadir, Zafar, et al., 2019 ).…”

Section: Discussionmentioning

confidence: 84%

Effect of static and dynamic jaw positions on postural stability among people with blindness

et al. 2022

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Background:In comparison with the people with normal sight, the mean center of gravity (COG) velocity is significantly higher among blind people. A strong relationship has been shown between jaw and neck sensorimotor and postural control. The purpose of this study was to determine the effect of different static and dynamic jaw positions on postural stability among subjects with blindness. Methods: Postural stability was measured as COG velocity in 39 blind subjects under the following five conditions: resting jaw (natural jaw position with no instructions, control), open jaw (teeth of both jaws slightly apart), clenched jaw (teeth tightly closed across each other), chewing (a standard bolus of gum at the natural palace), and tongue position (positioned behind the upper incisors) while standing on firm and foam surfaces. Results: The mean COG velocity while standing on the firm surface during resting, open jaw position, clenched jaw position, chewing, and tongue positions were 0.54, 0.50, 0.44, 0.59, and 0.46 deg/s, respectively. The mean COG velocity while standing on the foam surface during resting, open jaw position, clenched jaw position, chewing, andtongue positions were 1.42, 1.23, 1.10, 1.14, and 1.06 deg/s, respectively. Compared to the firm surface, the COG velocity was significantly higher on the foam surface in all five conditions (p < .001). In the comparison between the conditions, there were no significant differences in either the firm or foam surface in all five conditions (p > .05). Conclusion:People with blindness behave in the same way as sighted subjects on firm and foam surfaces. However, changes in static and dynamic jaw positions do not affect postural stability among them.

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“…The next direction was changed after three measurements in each direction. All measurements had an accuracy of ±.5 cm ( Zafar et al, 2020 ). Before the formal test, the participants were asked to make six attempts in each direction of each leg to familiarize themselves with the test movement.…”

Section: Methodsmentioning

confidence: 99%

Characteristics of the postural stability of the lower limb in different visual states of undergraduate students with moderate myopia

2023

Front. Physiol.

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Objective: To explore the characteristics of lower limb postural stability in undergraduates with moderate myopia in three different visual states.Methods: Twenty male undergraduate students were recruited to complete respectively the static and dynamic postural stability tests under eyes-closed, myopia (taking off their glasses immediately) and corrected vision conditions. A three-dimensional force platform (Bertec, United States) was used to test static postural stability, which calculated the total path length of the Center of Pressure (COP), path length in the antero-posterior (A/P) and medio-lateral (M/L) directions, COP area, SampleEntropy (SampEn), and low-, medium-, and high-frequency spectrum energies. Dynamic postural stability was tested using the Y-balance test, and the Y-balance test scores were calculated. The Vicon three-dimensional motion capture system (Oxford, United Kingdom) measured the maximum flexion angles of the ankle, knee, and hip joints. The electromyography (EMG) root mean square (RMS) and integral EMG (iEMG) of the tibialis anterior and lateral gastrocnemius of the lower extremity were simultaneously measured using wireless surface electromyography (Noraxon, United States).Results: The SampEn-A/P and SampEn-M/L of corrected vision state higher than myopia and eyes-closed states, and myopia state larger than eyes-closed state (χ2 = 51.631, p < .001). The original and standard scores of the anterior, postero-medial and comprehensive values of the three visual states had significant differences (F = 32.125, p < .001). The original and standard values of postero-lateral corrected vision and myopia were larger than those of eyes-closed states (F = 37.972, p < .001). The maximum flexion angles of the ankle and knee joints were in the following order: corrected vision, myopia and eyes-closed (F = 10.93, p < .001). The iEMG and RMS had significant differences in the three different states (χ2 = 12.700, p < .001) in the all directions of YBT.Conclusion: Compared with corrected vision, the stability of static posture in the state of myopia was decreased, and the postural regularity was more regular. The dynamic postural stability in the state of myopia was also lower than that corrected vision, and the activation and work of ankle muscles were also increased.

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Influence of different jaw positions on dynamic balance using Y‐balance test

Cited by 9 publications

References 40 publications

Effect of Chronic Ankle Sprain on Pain, Range of Motion, Proprioception, and Balance among Athletes

Effect of Chronic Ankle Sprain on Pain, Range of Motion, Proprioception, and Balance among Athletes

Effect of static and dynamic jaw positions on postural stability among people with blindness

Characteristics of the postural stability of the lower limb in different visual states of undergraduate students with moderate myopia

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