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皮质前皮质可塑性是学习有意的神经假肢技能所必需的
Aaron C Koralek1, Xin Jin, John D Long
1Helen Wills Neuroscience Institute, University of California, Berkeley, California 94720, USA.
Nature
|March 6, 2012
概括
皮质前皮质可塑性对于学习抽象技能至关重要,比如神经假肢行动. 这种神经回路对于体力技能学习至关重要,也支着以目标为导向的抽象技能获取.
科学领域:
- 神经科学是一个神经科学.
- 运动学习是指运动学习.
- 认知科学 认知科学
背景情况:
- 技能学习,无论是物理的还是抽象的,都依赖于神经可塑性.
- 众所周知,皮质前皮质回路参与体力技能学习.
- 这些电路在抽象技能学习中的作用在很大程度上仍未被探索.
研究的目的:
- 为了调查皮质状质可塑性对于抽象技能学习的必要性.
- 为了确定神经假肢的行为是否会激发与自然运动学习相似的神经机制.
主要方法:
- 开发了一种新的动物行为任务来训练抽象技能学习.
- 使用了听觉光标的神经假肢控制,独立于物理运动.
- 使用了基因操纵 (条性NMDA受体删除) 和行为测试 (值,遗漏).
主要成果:
- 动物成功地学会了控制听觉光标以实现目标指向的行动.
- 状神经元活动随着学习显著变化,显示出与目标相关的调制增加.
- 观察到运动皮层和条状神经元之间出现了强大的功能连接.
- 排列性NMDA受体的删除取消了皮质层层的可塑性,并影响了抽象技能的学习.
结论:
- 皮质三角管的可塑性是学习抽象技能的必要机制.
- 神经假肢技能学习使用与自然运动学习相同的神经电路.
- 这项研究突出了皮质三角管回路在各种形式的技能获取中的基本作用.
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