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会阴部皮肤和盆腔内脏的伤害感受性信息在猫骶髓后连合核神经元的汇聚

金善学, 李继硕, 秦秉志

第二军医大学生理学教研室. 上海 200433；第四军医大学解剖学教研室. 西安 710032；梁　琚脑研究中心. 西安

摘要

在戊巴比妥钠麻醉的猫上，用玻璃微电极细胞外记录的方法，观察了躯体和内脏的伤害性刺激对骶髓后连合核神经元活动的影响。结果表明，所有接受盆神经内Aδ纤维传入的神经元皆为特异性伤害感受或广动力范围神经元──它们可被包括会阴部皮肤的躯体感受野的机械性及强电刺激诱发。上述结果提示，Aδ纤维可能在盆腔内脏的伤害感受性传递中起重要作用。

关键词： 后连合核; 细胞外记录; Aδ纤维; 盆神经; 会阴区; 猫

Abstract

The effects of somatic and visceral nociceptive stimulation on neurons of dorsal commissuralnucleus in sacral spinal cord were studied in pentobarbitone anesthetized cats using extracllular recordingtechniques. The results indicated that all neurons deriving input from Aδ of the pelvic nerve were eithernociceptive specific or wide dynamic range neurons, and could be activated by mechanical or intense electricalstimulation of the respective receptive fields including perianal region. The above results suggest that the Aδ afferents innervation of the pelvic organ is important in nociception.

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引用本文：

金善学, 李继硕, 秦秉志. 会阴部皮肤和盆腔内脏的伤害感受性信息在猫骶髓后连合核神经元的汇聚[J]. 生理学报 1998; 50 (5): .

, , . . Acta Physiol Sin 1998; 50 (5): (in Chinese with English abstract).