Involvement of the ventral premotor cortex in controlling image motion of the hand during performance of a target-capturing task
Involvement of the ventral premotor cortex in controlling image motion of the hand during performance of a target-capturing task
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DOI：
10.1093/cercor/bhh193
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发表时间：
2005-07-01
期刊：
影响因子：
3.7
通讯作者：
Tanji, J
中科院分区：
文献类型：
--
作者：
Ochiai, T;Mushiake, H;Tanji, J
腹侧运动前皮质(PMV)参与运动的视觉引导。为了检验PMV中的神经元活动是否参与控制手的视觉图像的运动方向或手的实际运动，我们训练了一只猴子，让它使用与视频显示器上显示的手相同的一侧来捕捉视频显示器上呈现的目标。我们发现，PMV神经元主要表现出主要的运动活动，反映了要控制的图像运动，而不是手的物理运动。我们还发现，这种方向选择性PMV神经元的一半的活动取决于手的视频图像的哪一边(左或右)被用来捕捉目标。此外，改变手运动的开始位置不会影响手的一部分的这种选择性。这些发现表明，至少在使用肢体视觉图像来指导肢体运动的情况下，PMV神经元在决定身体哪个部位朝哪个方向移动方面发挥着关键作用。
The ventral premotor cortex (PMv) has been implicated in the visual guidance of movement. To examine whether neuronal activity in the PMv is involved in controlling the direction of motion of a visual image of the hand or the actual movement of the hand, we trained a monkey to capture a target that was presented on a video display using the same side of its hand as was displayed on the video display. We found that PMv neurons predominantly exhibited premovement activity that reflected the image motion to be controlled, rather than the physical motion of the hand. We also found that the activity of half of such direction-selective PMv neurons depended on which side ( left versus right) of the video image of the hand was used to capture the target. Furthermore, this selectivity for a portion of the hand was not affected by changing the starting position of the hand movement. These findings suggest that PMv neurons play a crucial role in determining which part of the body moves in which direction, at least under conditions in which a visual image of a limb is used to guide limb movements.