Lateralised motor control: hemispheric damage and the loss of deftness
Lateralised motor control: hemispheric damage and the loss of deftness
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DOI：
10.1136/jnnp.73.5.574
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发表时间：
2002-11-01
影响因子：
11
通讯作者：
Heilman, KM
中科院分区：
文献类型：
--
作者：
Hanna-Pladdy, B;Mendoza, JE;Heilman, KM
目的：为了了解右利手受试者在进行精确和协调的手指运动时，左半球与右半球相比是否发挥了双侧与对侧相比的运动控制。方法：本研究调查了左半球（LHD）或右半球（RHD）单侧病变患者和正常对照组（C）的手动运动不对称性（如速度、精确度和独立手指运动）的任务间差异。结果：正常受试者在需要快速协调和精确独立手指运动（硬币旋转）的任务中表现出最大的右手偏好。两个半球受损组均显示对侧运动缺陷，但LHD受试者的对侧和同侧缺陷的不对称程度存在显著差异（RHD>C>LHD）。最大的同侧赤字的LHD科目是在那些任务，需要精度（槽钉板和硬币旋转）。结论：半球的专业化程度，在一定程度上，取决于运动任务的性质，左半球运动控制必要的任务，需要精确和协调的独立手指运动。
Objective: To learn if the left compared with the right hemisphere of right handed subjects exerts bilateral compared with contralateral motor control when performing precise and coordinated finger movements.Methods: The study investigated intertask differences of manual motor asymmetries such as speed, precision, and independent finger movements, in patients with unilateral lesions of the left (LHD) or right hemisphere (RHD) and normal controls (C).Results: Normal subjects showed the greatest right hand preference on a task that required rapid coordinated and precise independent finger movements (coin rotation). Both hemisphere damaged groups revealed contralateral motor deficits, but the magnitudes of asymmetries were found to be significantly different (RHD>C>LHD) with contralateral and ipsilateral deficits for LHD subjects. The greatest ipsilateral deficits for the LHD subjects were on those tasks that require precision (grooved pegboard and coin rotation).Conclusions: The degree of hemispheric specialisation is, in part, dependent upon the nature of the motor task, with left hemisphere motor control necessary for tasks that require precision and coordinated independent finger movements.