调整的皮质:在成年人一生中,与融合的专业知识相关的结构和功能重塑
Erik A Wing1, Jordan A Chad1,2, Geneva Mariotti1,3
1Rotman Research Institute, Baycrest Academy for Research and Education Toronto, ON M6A 2E1.
概括
专业知识通过结构和功能变化重塑大脑. 鸟类识别专家显示,大脑结构的修改以及注意力和感知区域的选择性参与,提高了整个生命周期的表现.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 神经成像是一种神经成像.
背景情况:
- 神经可塑性使得在学习和广泛的练习后,大脑的结构和功能发生变化.
- 专业知识,特别是在需要复杂的感知,注意力和记忆的领域,导致显著的皮质重组.
- 了解结构改造和功能调整之间的相互作用对于理解经验依赖的大脑适应至关重要.
研究的目的:
- 研究鸟类识别专家与新手之间的多式上皮层重组.
- 检查大脑结构变化,功能激活和识别性能之间的关系.
- 探索专业知识如何影响与年龄相关的大脑变化.
主要方法:
- 扩散权重磁共振成像 (dMRI) 用于评估鸟类识别专家和新手的皮质结构.
- 功能磁共振成像 (fMRI) 在鸟类识别任务期间测量了与任务相关的大脑活动 (BOLD时间段).
- 收集了关于识别准确性的行为数据,并与神经成像发现相关联.
主要成果:
- 专家们在前和后皮层区域显示出较低的平均扩散度 (MD),这表明结构复杂性增加.
- 专家们观察到MD与年龄相关的增长趋势减弱,这表明潜在的减轻衰退.
- 专家观察到,在识别不太熟悉的非本地鸟类时,对前方双叶区域的选择性参与,响应的大小与性能相关.
结论:
- 识别鸟类的专业知识与相关大脑区域的融合结构改造和功能调整有关.
- 这些大脑修改支持专家的表现,并可能减轻与年龄相关的结构性衰退.
- 这些发现突出了广泛的实践如何塑造特定的神经回路,以在整个生命周期中实现高水平的认知功能.
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