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KMID : 0608320090160020001
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Physical Therapy Korea
2009 Volume.16 No. 2 p.1 ~ p.8
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Anticipatory Postural Adjustment in Selected Trunk Muscles Associated With Voluntary Arm and Leg Movement in the Persons With Stroke
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Jung Kyoung-Sim
Chung Yi-Jung
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Abstract
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Anticipatory postural adjustments is an example of the ability of the central nervous system to predict the consequence of the mechanical effect of movement on posture and helps minimize a forth coming disturbance. The aim of this study was to evaluate the sequence of activation of the trunk muscles during the performance of hip and shoulder movement and to determine the relationship between anticipatory activity and subjects’ motor and functional status in subjects with hemiplegia post stroke. Twenty-four poststroke hemiparetic patients enrolled in this study. Electromyographic activity of the lumbar erector spinae, latissimus dorsi, and of the internal oblique muscles was recorded bilaterally during flexion of both arm and from the rectus abdominis, external oblique, and internal oblique muscles during flexion of both hip. Onset latencies of trunk muscles were partially delayed in the subjects with hemiplegia post stroke (p<.05). With upper limb flexion, the onset of erector spinae muscle and latissimus dorsi muscle activity preceded the onset of deltoid on both side respectively (p<.05). A similar sequence of activation occurred with lower limb flexion. Also the onset of external oblique muscle and rectus abdominis muscle activity preceded the onset of rectus femoris muscle on both side (p<.05). Major impairments in the activity of trunk muscles in hemiparetic subjects were manifested in delayed onset between activation of pertinent muscular pairs. These problems were associated with motor and functional deficits and warrant specific consideration during physical rehabilitation of post stroke hemiparetic patients.
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KEYWORD
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Anticipatory postural adjustments, Stroke, Trunk muscles
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