双边大脑横向性对词生成的可靠性:谁留在中间?
Robin Gerrits1,2, Guy Vingerhoets2,3
1Research Group Cognition and Plasticity, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Leipzig, Germany.
Imaging neuroscience (Cambridge, Mass.)
|August 13, 2025
概括
在文字生成中,双边大脑不对称的可靠性是具有挑战性的. 这项研究发现,二分法左右分类比识别双边主导更容易复制,这表明大脑横向化的固有个体差异.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 心理语言学 心理语言学
背景情况:
- 单词的产生通常是左半球占主导地位,但个人的大脑不对称性有所不同.
- 侧面性指数 (LI) 通常用于评估半球主导地位,但由于可靠性问题,解释近对称 (双边) 的LI是有问题的.
- 不常见的双边LI病例 (≤10%的样本) 难以系统地调查.
研究的目的:
- 通过使用功能性跨皮多普勒声学 (fTCDS) 调查双边LIs的可靠性和跨方法概括性.
- 解决关于文字制作中的双边LI缺乏共识和系统调查的问题.
- 为研究和临床环境中对大脑不对称性进行分类提供建议.
主要方法:
- 两项研究使用fTCDS测量大脑血流速度.
- 研究1比较了双边和横向的LI在两个会议的口语流利任务中的可重现性.
- 研究2评估了fTCDS发现与其他横向性评估方法 (视觉半场和fMRI) 的概括性.
主要成果:
- 左侧分类的可复制性很高 (97%),而双边分类的可复制性较差 (51%).
- 不同的左右分类 (80%的可重复性) 比单独的双边分类更可靠.
- 通过fTCDS始终被分类为双边的参与者在视觉半场和fMRI评估中也显示了减少的组级不对称性.
结论:
- 侧面性指数反映了个体大脑不对称性,状态依赖波动和测量噪声的组合.
- 人口的一个子集表现出固有的弱横向神经系统,用于文字生成.
- 真正的半球对应性对于单词生成很可能是罕见的,并提出了对分类不对称性的建议.
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