刺激
功能磁共振成像
心理学
神经科学
脑刺激
布罗卡区
脑岛
大脑活动与冥想
认知
脑电图
作者
Lanlan Ren,Mengjie Lv,Xiyuan Wang,John W. Schwieter,Huanhuan Liu
出处
期刊:Cerebral Cortex
[Oxford University Press]
日期:2024-09-01
卷期号:34 (9)
被引量:1
标识
DOI:10.1093/cercor/bhae356
摘要
Abstract Repeated exposure to word forms and meanings improves lexical knowledge acquisition. However, the roles of domain-general and language-specific brain regions during this process remain unclear. To investigate this, we applied intermittent theta burst stimulation over the domain-general (group left dorsolateral prefrontal cortex) and domain-specific (Group L IFG) brain regions, with a control group receiving sham intermittent theta burst stimulation. Intermittent theta burst stimulation effects were subsequently assessed in functional magnetic resonance imaging using an artificial word learning task which consisted of 3 learning phases. A generalized psychophysiological interaction analysis explored the whole brain functional connectivity, while dynamic causal modeling estimated causal interactions in specific brain regions modulated by intermittent theta burst stimulation during repeated exposure. Compared to sham stimulation, active intermittent theta burst stimulation improved word learning performance and reduced activation of the left insula in learning phase 2. Active intermittent theta burst stimulation over the domain-general region increased whole–brain functional connectivity and modulated effective connectivity between brain regions during repeated exposure. This effect was not observed when active intermittent theta burst stimulation was applied to the language-specific region. These findings suggest that the domain-general region plays a crucial role in word formation rule learning, with intermittent theta burst stimulation enhancing whole-brain connectivity and facilitating efficient information exchange between key brain regions during new word learning.
科研通智能强力驱动
Strongly Powered by AbleSci AI