• Title, Summary, Keyword: Postural control

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Transient Effects of Calf Muscle Fatigue and Visual Control on Postural Balance During Single Leg Standing

  • Han, Jin-Tae
    • Journal of the Korean Society of Physical Medicine
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    • v.12 no.3
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    • pp.67-71
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    • 2017
  • PURPOSE: Muscle fatigue is a cause to change proprioception. The purpose of this study was to investigate the effects of calf muscle fatigue and visual control on postural balance during single-legged standing in healthy adults. METHODS: Nineteen healthy adults (male) were participated in this study (mean age: 24.36 years; mean height: 171.32 cm; mean weight: 64.58 kg). The postural balance (sway length, sway area, sway velocity of COG displacement) was measured by Balance Trainer System (BT4) in before and after calf muscle fatigue feeling in single legged stance. In this study, repetitive single-legged heel rise test was used to induce fatigue of the calf muscle. Paired t- test was used to compare the postural balance between before and after calf muscle fatigue. Data of subjects were analyzed using SPSS 22.0 (SPSS Inc., Chicago, IL, USA). Level of significance was set to .05. RESULTS: The sway length, sway area, sway velocity of COG (center of gravity) displacement after calf muscle fatigue feeling was significantly increased compared to before calf muscle fatigue feeling during single leg standing both eye open and close conditions (p<.05). CONCLUSION: This study suggested that calf muscle fatigue feeling has affected on postural balance when standing one leg both eye open and close conditions and postural control was disturbed by muscle fatigue and visual feedback in single leg standing.

Effects of Abnormal Neck Posture on Postural Stability (목 자세에 따른 선 자세에서의 신체균형능력 평가)

  • Park, Sung Ha
    • Journal of the Society of Korea Industrial and Systems Engineering
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    • v.41 no.2
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    • pp.16-23
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    • 2018
  • Postural instability can increase the likelihood of hazardous slip and fall accidents in workplaces. The present study intended to extend understanding of the effect of abnormal neck posture on postural control during quiet standing. The effect of body fatigue on the postural control was also of primary concern. Twelve healthy undergraduate students volunteered to participate in the experiment. Standing on a force platform with the neck neutral, flexed, extended, or rotated, subjects' center of pressures (COP) were measured under the two levels of body fatigue. For the fatigue condition, Subjects exercised in a treadmill to meet the predetermined level of body fatigue. Analyzing the position coordinates of COPs, the length of postural sway path was assessed in both medio-lateral (ML) axis and anterior-posterior (AP) axis. Results showed that, in AP direction, neck extension or rotation significantly increased the sway length as compared with neck neutral. Neck extension led to greater sway length compared to neck rotation. Neck flexion did not differ from neck neutral. The sway length in the AP direction also became significantly larger as the body fatigue accumulated after treadmill exercise. In ML direction, as compared to neutral posture, the neck extension, flexion, or rotation did not significantly affect the length of postural sway path. However, the sway length seemed to increase marginally with the neck extended during the fatigued condition. This study demonstrates that abnormal neck posture may interfere with postural control during standing. The ability to maintain postural stability decreases significantly with the neck extended or rotated. Body fatigue leads to postural instability further.

Effects of Game-based Visual Feedback Training on Postural Balance Control (게임기반의 시각 피드백 훈련이 자세균형 조절에 미치는 영향)

  • Yi, Jeong-Won;Yu, Mi;Jeong, Gu-Young;Lee, Nak-Bum;Kwon, Tae-Kyu
    • The Journal of the Korea Contents Association
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    • v.12 no.3
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    • pp.25-33
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    • 2012
  • In this study, we analyzed the effects of game-based visual feedback training on postural balance control in young adults. We provided postural balance training for four weeks in fifth minute a day and three days a week using training system of postural balance based forceplate. We evaluated the ability of postural balance using balance SD(Biodex, medicalscience Inc., USA) for the validation of game contents based visual feedback training program. The results showed that postural stability and limits of stability were improved significantly before and after the training(p<0.05). Our study indicates that postural balance training of visual feedback based game could be adapted for improving postural balance. Also, for application of this game-based visual feedback training in older adults, we could develope of various game contents for disease types and conduct quantitative analysis and data collection of postural balance in the aged.

Effects of Exercise-Induced Fatigue and Blocked Vision on Postural Control during Upright Stance (운동 피로와 시각정보 차단이 직립서기 자세제어에 미치는 영향)

  • Oh, Hyun-Jin;Youm, Chang-Hong;Kim, Tae-Hyeon
    • Korean Journal of Sport Biomechanics
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    • v.21 no.3
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    • pp.353-359
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    • 2011
  • The purpose of this study was to investigate the effects of exercise-induced fatigue and blocked vision on postural control during upright stance in elderly women. The study population included 22 women who were aged over 65 years, had no sustained orthopedic damage within the last 6 months, and had been randomly recruited. The results were analyzed with respect to the mediolateral and anteroposterior factors for the center of pressure. The exercise-induced fatigue and the absence of visual information increased the anteroposterior and mediolateral velocity for center of pressure. This means that the elderly women could control their posture through many sways. In conclusion, the exercise-induced fatigue and the blocked vision decreased ability of the postural control in elderly women. Further research on the change of postural control in relation to the types of exercise-induced fatigue and the levels of muscular fatigue is expected.

The Effects of Visual Feedback Self Exercise on Postural Control in Stroke Patients

  • Hwang, Seong-Soo;Lee, Je-Hyeok;Choi, Yul-Jung
    • Journal of the Korean Society of Physical Medicine
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    • v.12 no.4
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    • pp.105-112
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    • 2017
  • PURPOSE: The purpose of this research was to know the effect of visual feedback self exercise (VFSE) on postural control in stroke patients. METHODS: 26 CVA patients were participated. The experimental group (EG) 12 (46.2%) and the control group (CG) 14 (53.8%), 17 males and 9 females. The subjects preformed VFSE on training instrument 10 minutes for 20 times in 2-3 weeks. The test was done 3 times. RESULTS: There were no statistically significant differences of the general characteristics of subjects between EG and CG by sex, affected site, muscle tone, sensory deficit, unilateral neglects, and vestibular dysfunction. The postural control effects of VFSE, in the EG showed that there were statistically significant differences among the tests during VFSE. However in the CG there were no statistically significant differences among the tests during VFSE. Also there was statistically significant difference between EG and CG after VFSE (p<.05). On the right hemiplegic EG showed that there was statistically significant difference between premid test and pre-post test after VFSE. But, the left hemiplegic EG showed that there was no statistically significant difference between before and after VFSE with all of tests. CONCLUSION: CVA patients had significant different of body weight ratio between hemiplegic side and the other side. This research suggested that CVA patients need self exercise with visual feedback for the improvement postural control ability. Therefore Physical therapist should not only prescribe hand-on exercise but also need to teach them self sensory feedback exercise to help them improve their postural control.

The Effect of Balance Exercise on Postural Control and Shooting Record in Archers (균형훈련이 양궁선수들의 자세조절 및 Shooting기록에 미치는 영향)

  • Kim, Jae-Pil
    • Korean Journal of Sport Biomechanics
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    • v.18 no.2
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    • pp.65-74
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    • 2008
  • The purpose of this study was to investigate the effect on postural control and shooting record by archers of the balance exercise program for 12-weeks based on sprinter/skater pattern. the subject were 12 female archers(the control group 6, the experimental group 6) and the motion was measured using active balance system. the results were as follows. 1. Static postural controllability of archers was improved to reduce the whole path length and the sway of the COBx, COBy after the balance exercise program for 12-weeks based on sprinter/skater pattern. 2. Dynamic postural controllability of archers was improved to reduce the whole path length after the balance exercise program for 12-weeks based on sprinter/skater pattern. 3. Archers' postural controllability was improved when shooting after 12-week balance exercise program based on sprinter/skater pattern. but not effect shooting record.

The Effects of the Auditory Stimulus on Postural Control (자세제어에 대한 청각자극의 효과)

  • Kim, Y.;Jung, J.S.;Kim, N.G.
    • Proceedings of the KOSOMBE Conference
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    • v.1997 no.05
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    • pp.418-421
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    • 1997
  • We examined the effect of the auditory stimulus on postural control. The auditory stimulus control system composed of 8 speakers ,the audio amplifier, the PPI interface and the sound controller. We measured the sway of head position and COP. Our result showed that the auditory stimulus was effective on postural control. It also indicated that the auditory stimulus system might be applied to clinical use as a new postural control training system.

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Effects on Walking & Balance upon Improvement of Postural Control Therapy for Hemiplegic Patient (자세조절 증진이 편마비 환자의 보행과 균형에 미치는 영향 -증례 보고-)

  • Lee, Jin-Hwan;Min, Dong-Ki
    • PNF and Movement
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    • v.11 no.2
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    • pp.119-126
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    • 2013
  • Purpose : The neurologically impaired patients have sensory, motor, cognition, perception problems which cause reduction of body schema, balance control and postural control provoke disfunction. The purpose of this case report was to evaluate effects on gait&balance upon improvement of postural control for left hemiplegia. Methods : This study has performed single subject design from March to April 2013 for 6 weeks. The subject of this study was a 67years old female patient with left hemiplegia. Timed Up and Go (TUG) test and Functional Reach (FR) test were used as evaluation tool. The subject was treated 5 times a week for 30 minutes each. Results : The result is that the walking velocity was decreased, the ability of gait was improved than before the training. The length of FR was increased from 8.33cm to 22.67cm. Conclusion : According to the results, the treatment improves subject's ability of walking in this study.

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Effects of balance imagery of semi-tandem stance on a flat floor and balance beam for postural control: a comparison between older and younger adults

  • Lee, Jeong-Weon;Hwang, Sujin
    • Physical Therapy Rehabilitation Science
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    • v.4 no.2
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    • pp.87-93
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    • 2015
  • Objective: Balance is a preceding task for functional activities in daily activities as well as community-dwelling activities. To learn skilled and functional activities, it is also necessary to imagine an appropriate and effective movement representation used to plan and execute the functional activities. The purpose of this study was to evaluate the effects of balance imagery of semi-tandem stance on a flat floor and balance beam on balance abilities for elderly and young adults. Design: Cross-sectional study. Methods: Fifteen elderly and thirty-four young adults were enrolled in this study. In order to determine whether there is a change in postural control ability according to the different imagery training methods used, standing static balance measurements were performed. According to the therapist's instructions, participants were to stand in a semi-tandem position on the Good Balance System for 1 minute while imagining that they were standing on a balance beam, and while the postural control abilities was assessed. Results: Postural control was significantly different in balance ability of semi-tandem stance on a flat floor compared to on a balance beam in both geriatrics and young adults. Postural sway was more significantly decreased in young adults than older adults during balance imagery of semi-tandem stance on a flat floor as well as on balance beam (p<0.05). Conclusions: The results of this study suggest that the ability to mentally represent their actions was similar in older adults compared to young adults, although older adults showed a drop in efficiency of postural control more than young adults.