引用本文:李相南, 张丽.基于fNIRS的符号和非符号数量加工的脑机制研究[J].西南大学学报(自然科学版),2018,40(12):126~132
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基于fNIRS的符号和非符号数量加工的脑机制研究
李相南, 张丽1,2,3
1. 西南大学 心理学部, 重庆 400715;2. 安徽中医药大学 药学院, 合肥 230012;3. 中央财经大学 社会与心理学院, 北京 100081
摘要:
为探讨符号和非符号数量加工的特异性和非特异性问题以及二者间相互转换的神经机制,利用功能性近红外光谱成像技术(fNIRS)对30名成人进行测量,实验中让被试完成数量适应范式任务,结果发现:①非符号数量加工主要激活脑区为右顶上叶、右额上回和左右额中回,而符号数量加工则主要在左额中回有显著激活,且只有符号数量加工中出现了距离效应;②非符号向符号数量转换由左右顶上叶、左额上回和左右额中回负责,而符号向非符号数量转换则是由左顶上叶和左右额上回负责.研究结果既支持了符号和非符号数量加工的特异性观点,又进一步揭示符号和非符号数量相互转换有着不同的神经机制.
关键词:  符号数量加工  非符号数量加工  符号特异性  符号非特异性  转换机制
DOI:10.13718/j.cnki.xdzk.2018.12.020
分类号:B844.3
基金项目:国家自然科学基金项目(31470996).
An fNIRS-Based Study on the Brain Mechanism of Symbolic and Non-symbolic Number Processing
LI Xiang-nan, ZHANG Li1,2,3
1. Faculty of Psychology, Southwest University, Chongqing 400715, China;2. School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China;3. School of Sociology and Psychology, Central University of Finance and Economics, Beijing 100081, China
Abstract:
This study mainly explored whether the symbolic and non-symbolic number processing are notation-dependent or notation-independent,as well as the neural mechanism of mutual conversion between symbolic and non-symbolic numbers. Using functional near-infrared spectroscopy (fNIRS),we monitored the oxy-hemoglobin signal changes of 30 adults performing the adaptation paradigm tasks. The fNIRS results showed that non-symbolic number processing had an activation of the right superior parietal lobe,right superior frontal gyrus and bilateral middle frontal gyrus while symbolic number processing produced an activation of the left middle frontal gyrus only,that symbolic number processing elicited a distance effect,and that the conversion of non-symbolic to symbolic number processing activated bilateral superior parietal lobe while the conversion of symbolic to non-symbolic number processing had an activation of left superior parietal lobe and bilateral superior frontal gyrus. These results support the viewpoint that the symbolic and non-symbolic number processing is notation-dependent and indicate that the neural mechanism of conversion from symbol to non-symbol number processing is different from that of conversion from non-symbol to symbol number processing.
Key words:  symbolic number processing  non-symbolic number processing  notation-dependent  notation-independent  conversion mechanism
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