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单词的频率和阅读的需求调节了脑部在下额前环的激活

Abraham Sánchez^1,2, Manuel Carreiras^3,4,5, Pedro M Paz-Alonso^6,7

¹Basque Center On Cognition Brain and Language (BCBL), BCBL, Mikeletegi Pasealekua 69, 2, 20009, Donostia-San Sebastián, Spain. a.sanchez@bcbl.eu.

Scientific reports

|October 11, 2023

概括

在语义阅读任务中,单词频率会影响下额回路中的大脑活动. 阅读需求调节了这些效应,突出了腹腔阅读网络.

科学领域:

神经科学是一个神经科学.
认知科学认知科学
心理语言学心理语言学

背景情况:

单词频率影响处理效率,较低频率的单词导致行为任务的响应时间更长.
之前关于阅读中的单词频率效应的功能性MRI研究显示,由于不同的方法,结果不一致.
众所周知,阅读需求会影响阅读期间的大脑激活模式.

研究的目的:

调查单词频率对阅读期间大脑激活和功能连接的影响.
为了确定阅读需求是否调节单词频率效应.
澄清下面额回环和腹部阅读网络在语义处理中的作用.

主要方法:

54名健康参与者的功能性MRI (fMRI) 扫描.
两个单词阅读任务:一个低级感知任务和一个高级语义任务,使用高频和低频单词.
补充分析方法,包括区域激活和功能连接分析.

主要成果:

单词频率显著影响了下额 (pars orbitalis和triangularis) 的激活,仅在语义阅读任务期间.
腹部脑皮质在语义任务和感知任务中表现出更大的激活,独立于单词频率.
功能连接分析显示,背部和腹部阅读网络中的连接一致,不受单词频率或任务类型的影响.

结论:

下额头环涉及语义阅读处理,其激活由单词频率和任务需求调节.
研究结果支持腹腔阅读网络在阅读中的关键作用,特别是在语义方面.
该研究提供了关于词汇和词汇前阅读过程的见解,并协调了以前的异构发现.

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