Habas C, Axelrad H, Nguyen T H, Cabanis E-A
Laboratoire de Neurobiologie du Cervelet, Faculté de Médecine Pitié-Salpêtrière, 91 Bd. de l'Hôpital, 75013 Paris, France.
Neuroreport. 2004 Mar 22;15(4):595-9. doi: 10.1097/00001756-200403220-00005.
We used fMRI to study cerebellar activation during index finger-thumb opposition of the right hand and index finger-thumb opposition of both hands in in-phase and out-of-phase modes. The right hand movement activates the contralateral anterior lobe of the cerebellum. During bimanual in-phase movements, this activity pattern becomes bilateral. More interestingly, bilateral out-of-phase movements recruit the cerebellar posterior lobe VIII, which likely corresponds to the second homunculus. As out-of-phase movements differ from the in-phase movements only by their temporal complexity and their attentional awareness, this study demonstrates the preferential involvement of the cerebellar second homunculus in the control of complex movements.
我们使用功能磁共振成像（fMRI）研究右手食指与拇指对捏以及双手食指与拇指对捏的同相和异相模式下小脑的激活情况。右手运动激活小脑对侧前叶。在双手同相运动期间，这种活动模式变为双侧性。更有趣的是，双侧异相运动激活小脑后叶VIII，这可能对应于第二个运动小人图。由于异相运动与同相运动的区别仅在于其时间复杂性和注意力意识，本研究表明小脑第二个运动小人图在复杂运动控制中起优先作用。
