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KMID : 0361420110350020188
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Journal of Korean Academy of Rehabilitation Medicine
2011 Volume.35 No. 2 p.188 ~ p.194
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Effects of Dynamic Ankle-Foot Orthosis on Postural Balance Control in Hemiparetic Patients
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Kim Hong-Min
Chun Min-Ho
Kim Chung-Reen
Park Ji-Young
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Abstract
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Objective: To determine the effects of dynamic ankle foot orthosis (AFO) on balance control by comparing it with conventional plastic AFO and barefoot conditions in hemiparetic patients.
Method: Fifteen hemiparetic patients with brain lesions were recruited for this study. All subjects were capable of standing up independently and had a modified Ashworth score of less than two. The postural control capabilities of the subjects were assessed using the timed up and go (TUG) test, and Tetrax? tetra-ataxiametric posturography. The stability index, weight distribution index, and synchronization index were measured at six different head positions with dynamic AFO, conventional AFO and under barefoot conditions.
Results: There were nine males and six females, whose average age was 45.1 years. There was a significantly even weight distribution for the dynamic AFO and conventional AFO conditions relative to the barefoot condition in neutral, right-sided head, and left-sided head with eyes closed (p<0.05). And there was significantly increased stability in left sided-head, neck flexed positions with eyes closed for dynamic AFO and conventional AFO (p<0.05). However, there was no significant difference in weight distribution or stability between dynamic and conventional AFO conditions, except the stability in right-sided head position with eyes closed.
Conclusion: In this study, the balance control of hemiparetic patients with dynamic AFO was better than in the barefoot condition, and was similar to conventional AFO. Therefore, we suggest that dynamic AFO may be a useful orthosis for hemiparetic patients with mild to moderate spasticity with poor balance control and foot drop.
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KEYWORD
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Balance, Hemiplegia, Ankle foot orthosis
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