经颅磁刺激可影响运动程序的选择。
Transcranial magnetic stimulation can influence the selection of motor programmes.
作者信息
Ammon K, Gandevia S C
机构信息
Department of Clinical Neurophysiology, Prince Henry Hospital, Sydney, Australia.
出版信息
J Neurol Neurosurg Psychiatry. 1990 Aug;53(8):705-7. doi: 10.1136/jnnp.53.8.705.
Abstract
Transcranial magnetic stimulation is becoming increasingly popular to study the rapidly conducting output from the motor cortex. Little is known about the effects of such stimuli on other aspects of cortical function. In the study single magnetic stimuli, subthreshold for movement, produced significant preference for selection of one hand in a forced-choice task. The hand preference depended upon the direction of the induced current. It occurred when the coil was positioned over frontal but not occipital cortex and was not mimicked by weak DC stimulation. Single magnetic stimuli which do not evoke movement can alter high-level motor planning.
摘要
经颅磁刺激在研究运动皮层快速传导输出方面越来越受欢迎。关于此类刺激对皮层功能其他方面的影响，我们知之甚少。在该研究中，低于运动阈值的单次磁刺激在强制选择任务中产生了对一只手的显著选择偏好。手的偏好取决于感应电流的方向。当线圈置于额叶而非枕叶皮层上方时会出现这种情况，并且弱直流电刺激无法模拟这种情况。不引起运动的单次磁刺激可改变高级运动规划。
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