Motor learning after unilateral brain damage
Motor learning after unilateral brain damage
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DOI：
10.1016/s0028-3932(98)00145-6
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发表时间：
1999-07
期刊：
影响因子：
2.6
通讯作者：
C. Winstein;A. Merians;K. Sullivan
中科院分区：
文献类型：
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作者：
C. Winstein;A. Merians;K. Sullivan
40名前循环单侧脑血管意外中风后的成年人（发病后12年）和40名年龄匹配的对照组（M = 57岁）在两种增强反馈练习条件之一下练习快速，空间和时间限制的程序化动作。中风组的受试者使用病变部位同侧的上肢，经过一段时间的练习（198次试验）后，对习得、保持和再习得的准确性和一致性进行了评估，并在试验组和反馈条件下进行了比较。中风组和对照组在准确性和一致性方面都比练习有显著的提高，在记忆保持过程中这些变化相对持久。两组（中风组与对照组）在习得、保持或再习得阶段的表现没有差异。此外，两种强化反馈条件对被试的成绩没有显著影响，反馈条件与群体之间也没有交互作用。然而，与反馈条件无关，中风组在所有实验阶段的错误率都高于对照组（即，获取、保留、重新获取）。这些结果表明，单侧脑卒中相关的感觉运动区损伤主要影响运动技能的控制和执行过程，而不是这些技能的学习。这些研究结果的物理康复的意义进行了讨论。
Forty adults, post-stroke from anterior circulation unilateral cerebrovascular accident(∼2 years post onset) and 40 age-matched controls (M = 57 years) practiced a rapid,spatially and temporally constrained programmed action under one of two augmented feedbackpractice conditions. Participants in the stroke group used the upper limb ipsilateral to the lesion.After an extended practice period (198 trials), acquisition, retention, and reacquisitionperformance was assessed for accuracy and consistency and compared over trials, betweengroups and feedback conditions. Both stroke and control groups demonstrated significantimprovement in accuracy and consistency over practice with relative persistence of these changesduring retention. There were no differences between groups (stroke vs control) in performancepatterns across trials for acquisition, retention, or reacquisition phases. In addition, there were nodifferential effects of the two augmented feedback conditions on performance and no interactionsof feedback condition with group. However, independent of feedback condition, the stroke groupperformed with more error than did the control group during all experimental phases (i.e.,acquisition, retention, reacquisition). These results suggest that unilateral stroke-related damagein the sensorimotor areas primarily effects the processes underlying the control and execution of motor skills but not the learning of those skills. Implications of thesefindings for physical rehabilitation are discussed.