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左背中中前额叶皮质在自我生成,但不是外部调节的语言生产中的作用
Deborah Levy1, Quinn Greicius1,2, Catherine Wang1
1Department of Neurological Surgery, University of California, San Francisco, CA, USA.
Neurobiology of language (Cambridge, Mass.)
|June 18, 2025
概括
左背中前额叶皮层 (dmPFC) 的损伤与一种独特的语言障碍有关,影响自发语音产生. 这一发现突显了dmPFC在自我生成语言中的作用,与外部提示的语言不同.
科学领域:
- 神经科学是一个神经科学.
- 语言学的语言学.
- 神经语言学是一种神经语言学.
背景情况:
- 左背中前额叶皮层 (dmPFC) 已被公认为其在意志和运动控制中的作用.
- 它对语言处理的具体贡献,特别是自我生成的语音,在当前的神经模型中经常被低估.
研究的目的:
- 调查左侧dmPFC损伤与特定语言配置文件之间的关联.
- 确定这种特征是否只存在于dmPFC病变中,而不是由动机或运动缺陷引起的.
- 为了解这种语言综合征增加一个以患者为中心的叙述.
主要方法:
- 对大型神经外科数据库 (n=307) 的回顾性分析.
- 使用基于voxel和多变量病变症状映射 (VLSM,MLSM) 来识别病变症状相关性.
- 对比患有特定语言特征的患者的病变位置与对照组.
主要成果:
- 在左侧dmPFC损伤和影响自我生成语音产生的语言概况之间发现了显著的关联.
- 这种语言障碍与dmPFC切除有着不成比例的联系,与其他大脑区域相比,这种可能性增加了近15倍.
- 识别的语言特征与动机性或运动性语言障碍有所区别.
结论:
- 左dmPFC损伤会导致一种独特的语言障碍,主要影响自发言语.
- 这项研究强调了左dmPFC在流利,自我生成的言语的意志控制中的关键作用.
- 通过结合dmPFC,研究结果挑战了现有的语言模型,并从患者的康复叙述中提供了洞察力.
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