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增量训练增加了成年的听觉空间图的可塑性
Brie A Linkenhoker1, Eric I Knudsen
1Department of Neurobiology, Stanford University School of Medicine, Stanford, California 94305-5125, USA.
Nature
|September 20, 2002
概括
成年猫头可以通过渐进的视觉训练来学习适应它们的听觉定位路径,这种能力以前被认为仅限于幼. 这一发现揭示了成年人大脑更大的可塑性,并提出了增强中枢神经系统学习的新策略.
科学领域:
- 神经科学是一个神经科学.
- 神经可塑性 神经可塑性
- 审计系统的审计系统
背景情况:
- 成年人中枢神经系统的可塑性通常低于青少年.
- 成年猫头的听觉局部化途径与幼虫相比,对视野转移的适应能力有限.
- 以前的研究表明,青少年可以用镜眼镜形成新的间隔时差 (ITD) 神经生理地图,但成年人不能.
研究的目的:
- 调查成年小猫是否具有比以前认可的更大的听觉通路可塑性的能力.
- 确定增量视觉训练是否可以诱导成人听觉图表的适应性变化.
- 探索增强成人神经可塑性的策略.
主要方法:
- 将成年小猫暴露在带镜的眼镜中,以小的增量诱导水平视野转移.
- 用增量视觉镜暴露训练猫头,以诱导听觉地图的适应性变化.
- 评估光学层中间隔时间差异 (ITD) 的神经生理图.
主要成果:
- 成年小猫在他们的ITD图表中表现出适应性变化,当 prismatic 转移被逐渐体验时.
- 一旦通过增量训练建立,成年人的新ITD地图可以在一次大型镜转移中重新获得.
- 这项研究显示,成年猫头的可塑性能力远远大于以前的假设.
结论:
- 成年小猫表现出比以前理解的更大的中枢神经系统可塑性的能力.
- 逐渐暴露于改变的感官输入是解锁成人神经可塑性的关键策略.
- 这些发现表明了增强成人中枢神经系统学习和恢复的潜在治疗策略.
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