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Anterior cingulate cortex as a center of the medial pain system Yoriko Kawakami 1 , Mihoko Tomida 1 , Masafumi Fujita 2 1Department of Physiology, Tokyo Women's Medical University 2Department of Morphological Neuroscience, Division of Neuroscience, Research Fied of Medical Sciences, Graduate School of Medicine, Gifu University Keyword: ACC , affection , mechanical stimulation pp.929-934
Published Date 2004/12/10
DOI https://doi.org/10.11477/mf.1431100254
  • Abstract
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 Anterior cingulate cortex(ACC)is regarded as the center of medial pain system, which has affective aspects in pain. We studied how nociceptive neurons encode mechanical stimulus intensity in the rat ACC. Wide dynamic type like neurons in the ACC encoded stimulus intensity with response durations, but not frequency changes. Nociceptive specific neurons also dose-dependently reduced response duration with intracerebroventricularly-injected morphine. The nociceptive responses were blocked by electrical stimulation applied to the amygdala. In human fMRI study, an increase of amygdala activity accompanied with enhancement of ACC nociceptive responses. Nociceptive responses may be modulated directly by amygdala activities in the ACC.


Copyright © 2004, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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