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首页> 外文期刊>The European Journal of Neuroscience >Motor cortex stroke impairs individual digit movement in skilled reaching by the rat.
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Motor cortex stroke impairs individual digit movement in skilled reaching by the rat.

机译：运动皮层冲程会损害大鼠熟练触及的手指运动。

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摘要

Over 30 years ago, Castro [(1972) Brain Res., 37, 173-185] proposed that motor cortex (MtCx) ablation produced deficits in digital usage that contributed to the rat's impairments in a reach-to-eat task, but the impairment was not directly documented. The present study examined digit use in control rats and rats with MtCx lesions using high-speed (1000 f/s) video recording. Temporal and spatial characteristics of individual digits were evaluated by digitizing the tip of the digits and digital joints using the motion measurement system Peak Motus. Control rats displayed differential digital use during grasping actions and MtCx damage reduced individual digit movement, both as the paw was pre-shaped for grasping and in the grasping action itself. The findings show that although grasping is retained following MtCx damage, MtCx is essential for dexterous movement. The results are discussed in relation to the idea that rodent MtCx is not only necessary for rotatory movements of the limb, but also for digitalcontrol and in relation to the similarities of rodent digit use to that described for primates.
机译：30年前，Castro [（1972）Brain Res。，37，173-185]提出，运动皮层（MtCx）消融会导致数字用法的缺陷，从而导致大鼠的“吃到饱”任务受损。没有直接记录减损。本研究通过高速（1000 f / s）录像检查了对照大鼠和MtCx病变大鼠的手指使用情况。使用运动测量系统Peak Motus通过数字化手指尖和数字关节来评估各个手指的时空特征。对照大鼠在抓握动作过程中显示出不同的数字用法，而MtCx损伤减少了单独的手指移动，因为爪被预先定型用于抓握并且本身在抓握动作中。研究结果表明，尽管在MtCx损伤后仍能保持抓握状态，但MtCx对于灵巧运动至关重要。讨论了有关啮齿动物MtCx不仅是四肢旋转运动所必需的想法，而且还涉及数字控制以及与啮齿类动物手指与灵长类动物描述的相似性有关的想法。

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