Asymmetry of cortical activation during maximum and convenient tapping speed
Asymmetry of cortical activation during maximum and convenient tapping speed
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DOI：
10.1016/j.neulet.2004.09.058
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发表时间：
2005-01-03
影响因子：
2.5
通讯作者：
Jäncke, L
中科院分区：
文献类型：
--
作者：
Lutz, K;Koeneke, S;Jäncke, L
在过去的几年里，手指敲击频率对初级运动皮层和小脑的血流动力学反应的影响已经得到了很好的证实（频率效应）。本研究比较了这种影响的大小时，无论是优势或亚优势手使用的右，左利手。与以往的研究不同，本研究采用双手最大和方便的敲击频率作为敲击任务。结果证实了初级运动皮层和小脑的“速率效应”。此外，还发现扣带回运动区存在“速率效应”。一个新的发现是，皮质和小脑的“率效应”是相似的亚优势和优势的手，即使敲击率较低的亚优势的手。这一结果表明，亚优势运动皮层和神经连接的小脑区域在次优控制水平下运行，尽管在最大敲击任务期间已经达到最大神经生理激活。(C)2004爱思唯尔爱尔兰有限公司保留所有权利。
An effect of finger tapping rate on the hemodynamic response in primary motor cortex and the cerebellum has been well established over the last years (the rate effect). The present study compares the magnitude of this effect when either the dominant or subdominant hand is used by right and left handers. In contrast to previous studies maximum and convenient tapping rate for both hands are used as tapping tasks. The results confirm "rate effects" for the primary motor cortex and the cerebellum. In addition, a "rate effect" was found for the cingulate motor area. A novel finding is that the cortical and cerebellar "rate effects" are similar for the subdominant and for the dominant hand even though tapping rates are lower for the subdominant hand. This result demonstrates that the subdominant motor cortex and neurally connected cerebellar areas operate at suboptimal control levels although maximum neurophysiological activation has been reached during the maximum tapping task. (C) 2004 Elsevier Ireland Ltd. All rights reserved.