左撇子的语言优势:揭示左半球的全球优势与特定的右半球区域优势
Mudathir Bakhit1, Ryo Hiruta1, Yousuke Kuromi1
1Department of Neurosurgery, Fukushima Medical University, Fukushima, JPN.
Cureus
|December 30, 2024
概括
这项研究表明,虽然左半球对语言处理的优势在左撇子 (LH) 和右撇子 (RH) 个体中都是常见的,但LH个体表现出更平衡的脑活动和独特的右半球参与特定的语言任务.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 心理学 心理学 心理学
背景情况:
- 手性,即偏爱一只手而不是另一只手,会影响大脑对语言等认知功能的侧向化.
- 之前的研究表明,左半球对语言的优势在左撇子 (LH) 和右撇子 (RH) 个体中普遍存在.
- 使用先进的神经成像技术观察到LH和RH个体之间语言横向化的微妙差异.
研究的目的:
- 研究LH和RH个体语言横向化的空间模式.
- 使用高分辨率fMRI和人类连接体项目的多式分片 (MMP) 来比较LH和RH组之间的语言任务期间的大脑活动.
主要方法:
- 利用了来自人类结合体项目 (HCP) 的140名健康成年人的fMRI数据 (70LH,70RH).
- 管理的语言任务涉及听觉故事和故事与数学对比,使用HCP管道处理数据并应用MMP地图.
- 通过计算大脑表面元素中的正元素 (PE),量化血氧水平依赖 (BOLD) 活动,并分析半球主导和群体差异.
主要成果:
- 在RH个体中观察到强大的左半球对语言的优势,而LH个体显示出更平衡的半球活动.
- 在两个群体的许多MMP区域中发现了PE的显著区域不对称性,LH个体在特定领域表现出明显的不对称性.
- 对LH和RH组的比较显示了14个MMP区域的显著差异,主要是在右半球的下叶中,在LH个体中显示出较高的活动.
结论:
- 对于语言处理来说,左半球的横向化是显而易见的,不管是用手的.
- 多模式大脑分片显示了LH和RH个体之间不同的语言处理模式.
- 在语言任务中,LH个体在特定的右半球区域表现出独特的高度活动.
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