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首页> 外文期刊>Journal of stroke and cerebrovascular diseases: The official journal of National Stroke Association >Right in Comparison to Left Cerebral Hemisphere Damage by Stroke Induces Poorer Muscular Responses to Stance Perturbation Regardless of Visual Information
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Right in Comparison to Left Cerebral Hemisphere Damage by Stroke Induces Poorer Muscular Responses to Stance Perturbation Regardless of Visual Information

机译：与左脑半球损伤的左侧脑卒中造成较差的肌肉反应，无论视觉信息如何

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Objective: Fast and scaled muscular activation is required to recover body balance following an external perturbation. An issue open to investigation is the extent to which the cerebral hemisphere lesioned by stroke leads to asymmetric deficits in postural reactive responses. In this experiment, we aimed to compare muscular responses to unanticipated stance perturbations between individuals who suffered unilateral stroke either to the right or to the left cerebral hemisphere. Methods: Stance perturbations were produced by releasing a load attached to the participant's trunk, inducing fast forward body oscillation. Electromyography was recorded from the gastrocnemius medialis and biceps femoris muscles. Muscular activation from age-matched healthy individuals was taken as reference. Results: Analysis indicated that damage to the right hemisphere induced delayed activation onset, and lower rate and magnitude of activation of the proximal and distal muscles of the paretic leg. Those deficits were associated with stronger activation of the nonparetic leg. Comparisons between left hemisphere damage and controls showed deficits limited to activation of the biceps femoris of the paretic leg. Manipulation of visual information led to no significant effects on muscular responses. Conclusions: These results suggest that right cerebral hemisphere damage by stroke leads to more severe deficits in the generation of reactive muscular responses to stance perturbation than damage to the left cerebral hemisphere regardless of visual information.
机译：目的：在外部扰动后，需要快速和缩放的肌肉激活来恢复身体平衡。对调查开放的问题是脑半球损伤的程度，脑卒中损害导致姿势反应反应的不对称缺陷。在这个实验中，我们旨在比较肌肉反应对患有单侧中风的个体之间的意想不到的姿势扰动，左右脑半球。方法：通过将连接到参与者的行李箱的负载释放，产生快速前进体振荡来生产姿态扰动。从腓肠肌肌动肌和二头肌股骨肌肉记录了肌电学。年龄匹配的健康个体的肌肉激活作为参考。结果：分析表明，右半球损伤诱导延迟激活发作，以及渐进式近端和远端肌肉激活的较低速率和程度。这些缺陷与强烈的腿部激活有关。左半球损坏和控制之间的比较显示缺陷限于激活瘫痪腿的二头肌股骨。对视觉信息的操纵导致对肌肉反应没有显着影响。结论：这些结果表明，右脑半球损伤的中风损伤导致产生更严重的缺陷，从而产生对静态扰动的反应性肌肉反应而不是左脑半球的损伤，无论视觉信息如何。

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