Contributions of the anterior cingulate cortex and amygdala to pain- and fear-conditioned place avoidance in rats

被引:159
作者
Gao, YJ
Ren, WH
Zhang, YQ
Zhao, ZQ
机构
[1] Fudan Univ, Inst Neurobiol, Shanghai 200433, Peoples R China
[2] Nantong Med Coll, Dept Anat & Neurobiol, Nantong 226001, Jiangsu, Peoples R China
关键词
anterior cingulate cortex; amygdala; conditioned place avoidance; nociceptive behavior; pain; fear;
D O I
10.1016/j.pain.2004.04.030
中图分类号
R614 [麻醉学];
学科分类号
100217 ;
摘要
The pain experience includes a sensory-discriminative and an affective-emotional component. The sensory component of pain has been extensively studied, while data about the negative affective component of pain are quite limited. The anterior cingulate cortex (ACC), and amygdala are thought to be key neural substrates underlying emotional responses. Using formalin-induced conditioned place avoidance (FCPA) and electric foot-shock conditioned place avoidance (S-CPA) models, the present study observed the effects of bilateral excitotoxic (quinolinic acid 200 nmot/mul) lesions of the ACC and amygdala on pain and fear induced negative emotion, as well as on sensory component of pain. In the place-conditioning paradigm, both intraplantar (i.pl.) injection of formalin and electric foot-shock produced conditioned place avoidance. Excitotoxin-induced lesion of either the ACC or amygdala significantly reduced the magnitude of F-CPA. However, the decrease in the magnitude of S-CPA occurred only in the amygdala, but not ACC lesioned animals. Neither ACC nor amygdala lesion significantly changed formalin-induced acute nociceptive behaviors. These results suggest that the amygdala is involved in both pain- and fear-related negative emotion, and the ACC might play a critical role in the expression of pain-related negative emotion. (C) 2004 International Association for the Study of Pain. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:343 / 353
页数:11
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