基底 - 前脑电路的中断阻止了学习的发音的可塑性
1Keck Center for Integrative Neuroscience, Department of Physiology, University of California San Francisco, 94143-0444, USA. msb@phy.ucsf.edu
Nature
|April 28, 2000
概括
耳聋的成年斑马会打乱他们的鸟歌. 然而,损害特定的大脑电路可以防止这种歌曲的恶化,这表明这种途径通常根据听觉反来纠正声乐错误.
科学领域:
- 神经科学是一个神经科学.
- 动物行为 动物行为
- 生物声学是一种生物声学.
背景情况:
- 声学学习,就像人类的言语和鸟歌一样,依赖于听觉反.
- 成年歌鸟和人类的听觉反损失导致声调下降.
- 对于处理听觉反来维持学习的发音的神经基础还没有完全理解.
研究的目的:
- 为了研究成年斑马在歌曲维护期间的听觉反处理背后的神经机制.
- 为了确定特定的大脑电路是否参与根据听觉输入调整声产.
主要方法:
- 成年斑马被使耳聋,以评估对歌曲产生的影响.
- 一组耳聋的鸟类在特定的基底 - 前脑电路上受到损伤.
- 在干预之前和之后分析了歌曲的声学特征.
主要成果:
- 听力障碍本身就导致了歌曲质量的逐渐下降.
- 在失聪的鸟类中,损伤基底 - 前脑电路可以防止歌曲的恶化.
- 这表明基底-前脑通路产生信号,在听觉反损失后驱动不适应性歌曲变化.
结论:
- 皮层-基底质回路在评估运动控制的感觉反方面发挥着作用.
- 这些电路对于适应性地修改学习的声音行为至关重要.
- 破坏这些电路会损害声乐的可塑性,但不会影响以前建立的歌曲模式.
相关概念视频
00:58Plasticity
Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
01:01Neuroplasticity
Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.