ACTIVATION PROCESSES DURING MENTAL PRACTICE IN STROKE PATIENTS
ACTIVATION PROCESSES DURING MENTAL PRACTICE IN STROKE PATIENTS
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DOI：
10.1016/0167-8760(94)90059-0
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发表时间：
1994-06-01
影响因子：
3
通讯作者：
ZIPPEL, C
中科院分区：
文献类型：
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作者：
WEISS, T;HANSEN, E;ZIPPEL, C
在健康的受试者中，已知心理练习可以提高运动表现。它也被认为是伴随着更高的中枢神经活动。由于这样的效果似乎是理想的康复，我们调查的可能性检测中枢神经活动的变化，通过脑电图中风患者，以及这些变化是否类似于在健康受试者中观察到的。12名接受特定中风后康复治疗的左侧偏瘫患者被要求进行简单的手臂运动序列。在接下来的心理练习阶段，患者被要求想象相同的序列，而没有任何真实的运动。在休息和想象期间记录EEG背景活动。在计算了θ、α和β-1波段内的z转换功率值后，评估了休息期和想象期之间的差异的显著性。与休息期相比，中风患者在心理练习期间表现出theta，alpha和beta-1功率的显着下降。这些变化与健康受试者中获得的变化相似。Theta功率在中央和顶叶导联降低。中枢α功率仅在想象对侧手臂时减少，这一现象以及中枢衍生β 1功率的减少也在真实的运动表现中得到，可能表明感觉运动皮层的激活。根据内部反馈机制的假设，这种激活是心理练习中运动学习的必要前提。
In healthy subjects, mental practice is known to improve motor performance. It is also known to be accompanied by a higher central nervous activity. Since such effects seem to be desirable for rehabilitation, we investigated the possibility of detecting changes in central nervous activity by means of EEG in stroke patients, and whether these changes were similar to those observed in healthy subjects. 12 left-sided hemiplegic patients who underwent a specific post-stroke rehabilitation treatment were requested to perform a simple arm movement sequence. In the following mental practice period the patients were requested to imagine the same sequence without any real movement. EEG background activity was recorded during rest and imagination periods. After the calculation of z-transformed power values within the theta, alpha, and beta-1 band, differences between rest and imagination periods were evaluated for their significance. Stroke patients show significant decreases of theta, alpha, as well as beta-1 power during mental practice in comparison to the rest period. These changes are similar to those obtained in healthy subjects. Theta power decreases in central and parietal leads. Central alpha power diminishes only during imagination of the contralateral arm. This phenomenon as well as the decrease of beta-1 power in central derivation were also obtained during real motor performance and might indicate an activation of the sensorimotor cortex. In accordance with the hypothesis of internal feedback mechanisms, this activation is a necessary prerequisite for motor learning during mental practice.