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视觉识别过程中梨状周围皮质内毒蕈碱阻断的作用

Effects of muscarinic blockade in perirhinal cortex during visual recognition.

作者信息

Tang Y, Mishkin M, Aigner T G

机构信息

Laboratory of Neuropsychology, National Institute of Mental Health, Bethesda, MD 20892-4415, USA.

出版信息

Proc Natl Acad Sci U S A. 1997 Nov 11;94(23):12667-9. doi: 10.1073/pnas.94.23.12667.

Abstract

Stimulus recognition in monkeys is severely impaired by destruction or dysfunction of the perirhinal cortex and also by systemic administration of the cholinergic-muscarinic receptor blocker, scopolamine. These two effects are shown here to be linked: Stimulus recognition was found to be significantly impaired after bilateral microinjection of scopolamine directly into the perirhinal cortex, but not after equivalent injections into the laterally adjacent visual area TE or into the dentate gyrus of the overlying hippocampal formation. The results suggest that the formation of stimulus memories depends critically on cholinergic-muscarinic activation of the perirhinal area, providing a new clue to how stimulus representations are stored.

摘要

对猴子而言,鼻周皮质的破坏或功能障碍以及全身性给予胆碱能毒蕈碱受体阻滞剂东莨菪碱会严重损害刺激识别能力。本文表明这两种效应存在关联:研究发现,将东莨菪碱双侧微量注射到鼻周皮质后,刺激识别能力会显著受损,但等量注射到相邻的外侧视觉区域TE或上方海马结构的齿状回后则不会。这些结果表明,刺激记忆的形成关键取决于鼻周区域的胆碱能毒蕈碱激活,这为刺激表征的存储方式提供了新线索。

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