在两个从婴儿期就缺少一个叶的个体中,听觉皮层的功能组织得到保护
Tamar I Regev1,2, Benjamin Lipkin1,2, Dana Boebinger3,4
1Brain and Cognitive Sciences Department, Massachusetts Institute of Technology, Cambridge, MA, USA.
iScience
|September 12, 2024
概括
人类听觉皮层处理声音使用一致的模式,即使一个叶从婴儿期就缺失了. 这证明了大脑的功能.
科学领域:
- 神经科学是一个神经科学.
- 听觉神经科学 听觉神经科学
- 神经成像是一种神经成像.
背景情况:
- 人类对自然声音的皮质反应,通过功能磁共振成像 (fMRI) 测量,可以使用规范响应模式来建模.
- 这些图案的功能性和解剖学性质是可解释的.
- 之前的研究还没有在早期单边叶发生的个体中广泛探索听觉皮层组织.
研究的目的:
- 为了调查人类对自然声音皮层反应的正规组织是否在由于早期大脑损伤而导致只有一只叶的个体中得到保存.
- 检查听力系统的功能可塑性和冗余性.
主要方法:
- 功能磁共振成像 (fMRI) 用于分析大脑对自然声音的反应.
- 该研究包括一个独特的家庭,兄弟姐妹从婴儿时期就缺少左侧或右侧叶,再加上一个神经类型的兄弟姐妹.
- 这些兄弟姐妹的完整半球的反应与12名神经类型参与者的反应进行了比较.
主要成果:
- 所有的兄弟姐妹,尽管缺少一个叶,在完整的半球表现出典型的听觉反应.
- 在兄弟姐妹中没有观察到单边叶发生的行为缺陷.
- 在完好无损的半球中的听觉皮层显示正常的功能组织.
结论:
- 听力皮层在一个半球的发展和组织似乎并不取决于另一半球的存在.
- 这些发现凸显了双边审计系统的显著冗余性和同等潜力.
- 在早期单边叶损失后,大脑在听觉处理方面表现出显著的适应性.
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