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语言获取的序列作为决定语言理解中心在脑皮层中的位置的一个因素在序列多语言中
Tomasz Wolak1, Julia M Nowak2, Iwona Chaberska3
1Bioimaging Research Centre, World Hearing Centre, Institute of Physiology and Pathology of Hearing, Kajetany, Poland.
大脑成像揭示了多语言个体连续学习的每个语言的独特皮质区域. 随着每种新语言的出现,左半球的主导地位都在下降,这影响了语音理解的表现.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 语言学的语言学.
背景情况:
- 多语种是常见的,但大脑对顺序获得的语言的表征是不太了解的.
- 缺乏研究阻碍了多语言患者的神经外科管理指南.
研究的目的:
- 确定特定的大脑区域,用于多语言个体的每种语言 (L1-L4) 的语音理解.
- 研究语言获取顺序与它的皮层表现之间的联系.
主要方法:
- 招募了非常熟练的多语种学员,他们在三岁后学习语言.
- 使用fMRI (T1加权和回声平面成像) 的被动倾听来测量大脑活动 (BOLD信号).
- 使用SPM12对比L2,L3,L4对母语 (L1) 和未知语言 (LN) 的脑活动.
主要成果:
- 观察到左半球从L1到L4的主导地位的逐渐下降.
- L2显示右侧中旋的激活增加;与L1.1.相比,L3在左侧状旋的激活增加.
- L1表现出比以后获得的语言更大的激活;L2/L3显示出与LN相比右侧岛屿活动增加.
结论:
- 独特的皮层区域参与处理顺序获得的语言.
- 建议对L1,L2和L3进行常规的外科皮层测绘.
- 在个别情况下考虑L4映射;需要对语音产生进行进一步研究.
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