Jäncke L, Peters M, Schlaug G, Posse S, Steinmetz H, Müller-Gärtner H
Department of General Psychology, Otto-von-Guericke-University, Magdeburg, Germany.
Brain Res Cogn Brain Res. 1998 Apr;6(4):279-84. doi: 10.1016/s0926-6410(98)00003-2.
Functional magnetic resonance tomography (fMRI) analysis of unimanual and bimanual sequential movements in righthanders showed the following effects. First, a rate-dependent activation of the somato-motor cortex was confirmed, with faster movement rates producing higher activation both in terms of signal intensity and number of activated voxels. Second, the right hemisphere showed more activation than the left hemisphere during unimanual tasks. Third, during bimanual movements, the left hemisphere showed greater activation than the right hemisphere. Finally, while the left hemisphere showed a marked change in activation patterns from unimanual to bimanual task, the right hemisphere activation patterns were not sensitive to task changes. The hemispheric asymmetries suggest substantial left hemisphere involvement in the coordination of bimanual tasks.
对右利手进行单手和双手连续动作的功能磁共振断层扫描（fMRI）分析显示出以下结果。首先，证实了躯体运动皮层存在速率依赖性激活，运动速率越快，无论是信号强度还是激活体素数量方面，激活程度越高。其次，在单手任务中，右半球比左半球表现出更多激活。第三，在双手动作过程中，左半球比右半球表现出更大激活。最后，虽然左半球在从单手任务到双手任务时激活模式有明显变化，但右半球激活模式对任务变化不敏感。半球不对称性表明左半球在双手任务协调中发挥着重要作用。
