Contribution of muscle strength and integration of afferent input to postural instability in persons with stroke
Contribution of muscle strength and integration of afferent input to postural instability in persons with stroke
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DOI：
10.1177/1545968304271171
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发表时间：
2004-12-01
影响因子：
4.2
通讯作者：
Donnelly, CA
中科院分区：
文献类型：
--
作者：
Marigold, DS;Eng, JJ;Donnelly, CA
Objective.确定中风患者肌力与姿势摇摆之间的关系，了解视觉和踝关节本体感觉被操纵的条件。方法.从社区招募了40名中风患者和40名健康老年人对照，并进行了平衡测试，包括6种站立时操纵视觉和体感信息的条件。在每个条件下测量姿势摇摆。此外，下肢关节扭矩和足底表面的皮肤感觉，脚进行了评估。结果姿势摇摆随着更具挑战性的站立条件而增加（即，当操纵多个感觉系统时）与对照组相比，中风组在更大程度上。在最具挑战性的条件下，肌肉力量只与摇摆有关。此外，与对照组相比，更多的中风患者在平衡测试期间摔倒。结论.除了肌无力之外，重新加权/整合传入信息的障碍似乎有助于中风患者的姿势不稳定和福尔斯。这些发现可以被临床医生用来设计有效的干预措施，以改善中风后的姿势控制。
Objective. To determine the relationship of muscle strength to postural sway in persons with stroke understanding conditions in which vision and ankle proprioception were manipulated. Methods. Forty persons with stroke and 40 healthy older adult controls were recruited from the community and underwent balance testing consisting of 6 conditions that manipulate vision and somatosensory information while standing. Postural sway was measured during each condition. In addition, lower extremity joint torques and cutaneous sensation from the plantar surface of the,foot were assessed. Results. Postural sway was increased with more challenging standing conditions (i.e., when multiple sensory systems were manipulated) to a greater extent with the group with stroke compared to controls. Muscle strength was only correlated to sway during the most challenging conditions. Furthermore, a greater number of persons with stroke fell during the balance testing compared to controls. Conclusions. Impairments in re-weighting/integrating afferent information, in addition to muscle weakness, appear to contribute to postural instability and falls in persons with stroke. These findings can be used by clinicians to design effective interventions for improving postural control following stroke.