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Studies on cognitive processing of human facial expression by event-related brain potentials and cerebral blood flow (CBF).

通过事件相关脑电位和脑血流量（CBF）研究人类面部表情的认知处理。

基本信息

批准号：
14510089
负责人：
MOROTOMI Takashi
金额：
$ 2.37万
依托单位：
SAKUSHIN GAKUIN UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

项目摘要

This research was performed to study cognitive processing of human facial expression by using the event-related brain potentials and cerebral blood flow (CBF) measured by near infrared spectroscopy (NIRS).Event-related brain potentials (ERPs) were elicited by successive presentation of two different faces with interval of 250ms or without interval (adaptation paradigm). Smile or anger faces were preceded by either a neutral face of a same person, a smile or anger face of a different person, or a neutral face of a different person, which generated expressional, individual, or both expressional and individual change, respectively. Cerebral blood flow (CBF) were elicited by right or left half visual field presentation of neutral, smile and anger faces with duration of 10sec. In addition, smile, anger, and two kinds of neutral faces were presented by using oddball paradigm.Findings are as follows.(1)the expressional change to smile or anger faces from neutral faces elicited P310 component, which showed the peak amplitude at the vertex (Cz).(2)for the preceding faces, there were no differences in face-related component, N170 at T5 and T6. In contrast, the second faces elicited a larger N170 for expressional change relative to individual or both changes.(3)the concentration of oxy-Hb to smile face increased in contralateral parieto-occipital region of stimulus field, but decreased in anger face. In contrast, the concentration of oxy-Hb to smile and anger faces was no difference in ipsilateral parieto-occipital region of stimulus field.(4)for neutral face, the concentration of oxy-Hb decreased in left parieto-occipita region, and increased in right parieto-occipita region. In addition, the increase of concentration of oxy-Hb in right parieto-occipital region preceded to that in left parieto-occipital region.

本研究采用事件相关脑电位（ERPs）和脑血流量（CBF）的近红外光谱（NIRS）技术，研究了面孔表情的认知加工过程。微笑或愤怒的脸之前，无论是同一个人的中性脸，微笑或愤怒的脸不同的人，或一个中性的脸不同的人，这产生表情，个人，或表情和个人的变化，分别。分别以中性、微笑和愤怒表情的右半视野或左半视野诱发脑血流量（CBF），持续10秒。此外，本研究还采用古怪范式对微笑、愤怒和两种中性面孔进行了表征。（1）由中性面孔到微笑或愤怒面孔的表情变化诱发P310成分，其峰值出现在顶点（Cz）。（2）在T5、T6时，面部相关成分N170无显著性差异。相比之下，第二个面孔引起了更大的N170的表情变化相对于个人或两者的变化。（3）微笑时，对侧顶枕区的氧合血红蛋白浓度升高，而愤怒时，对侧顶枕区的氧合血红蛋白浓度降低。相反，在刺激野的同侧顶枕区，对微笑和愤怒面孔的oxy-Hb浓度没有差异。（4）中性脸时，左侧顶枕区氧合血红蛋白浓度降低，右侧顶枕区氧合血红蛋白浓度升高。此外，右侧顶枕区氧合血红蛋白浓度的升高先于左侧顶枕区。