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童年贫困后的语言处理:神经网络中断的证据
Suzanne C Perkins1, S Shaun Ho2, Gary W Evans3
1Research Center for Group Dynamics, Institute for Social Research, University of Michigan, Ann Arbor, MI 48106, United States.
童年贫困影响成人语言技能和大脑功能. 即使当前的能力相似,贫困历史也会改变语言处理的神经网络.
科学领域:
- 神经科学是一个神经科学.
- 发展心理学 发展心理学
- 社会经济学研究 社会经济学研究
背景情况:
- 儿童贫困与认知缺陷有关,包括成人语言功能.
- 儿童贫困背景的成年人语言的神经生物学基础仍然不清楚,即使在控制当前功能时也是如此.
研究的目的:
- 调查儿童时期的贫困是否会扰乱大人的语言处理的大脑基础.
- 检查童年贫困,语音意识和语言任务中的神经活动之间的关系.
主要方法:
- 在51名成年人 (24岁) 的语音/打印处理任务中使用与事件相关的fMRI,来自儿童贫困纵向研究.
- 评估行为声学意识 (LP) 和分析大脑激活和功能连接 (PPI).
主要成果:
- 患有童年贫困背景的成年人表现出较低的语音意识 (LP).
- 童年贫困群体在下额 (IFG) 和海马体中表现出神经激活模式的改变.
- 心理生理学相互作用 (PPI) 分析揭示了贫困群体中与语言相关的大脑区域 (Broca,MTG,Wernicke) 之间的明显连接模式.
结论:
- 童年贫困破坏了在成年时支持语言处理的神经网络,独立于当前的语音意识.
- 这些发现表明,早期社会经济劣势对语言的神经生理基础有持久的影响.
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