HOW SOMATOTOPIC IS THE MOTOR CORTEX HAND AREA
HOW SOMATOTOPIC IS THE MOTOR CORTEX HAND AREA
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DOI：
10.1126/science.8332915
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发表时间：
1993-07-23
期刊：
影响因子：
56.9
通讯作者：
HIBBARD, LS
中科院分区：
文献类型：
--
作者：
SCHIEBER, MH;HIBBARD, LS
初级运动皮质(M1)被认为控制身体不同部位从躯体组织的皮质区域的运动。然而，电刺激表明，控制不同手指的区域重叠。这种重叠可能是人为的，或者可能表明M1的激活产生手指运动发生在比通常假设更广泛的皮质区域。这些可能性在移动不同手指的猴子身上得到了区分。记录显示，单个M1神经元随着不同手指的运动而活动。活跃于不同手指运动的神经元群广泛重叠。因此，任何手指运动的控制似乎利用了分布在M1手部区域的神经元群体，而不是身体位置上分离的群体。
The primary motor cortex (M1) is thought to control movements of different body parts from somatatopically organized cortical territories. Electrical stimulation suggests, however, that territories controlling different fingers overlap. Such overlap might be artifactual or else might indicate that activation of M1 to produce a finger movement occurs over a more widespread cortical area than usually assumed. These possibilities were distinguished in monkeys moving different fingers. Recordings showed that single M1 neurons were active with movements of different fingers. Neuronal populations active with movements of different fingers overlapped extensively. Control of any finger movement thus appears to utilize a population of neurons distributed throughout the M1 hand area rather than a somatotopically segregated population.