猫脑干中的神经元受到来自心脏和肺部的迷走传入纤维的刺激。
Neurones in the brain stem of the cat excited by vagal afferent fibres from the heart and lungs.
作者信息
Bennett J A, Goodchild C S, Kidd C, McWilliam P N
出版信息
J Physiol. 1985 Dec;369:1-15. doi: 10.1113/jphysiol.1985.sp015884.
Abstract
Extracellular recordings were made from 164 neurones in the nucleus tractus solitarius and dorsal motor vagal nucleus of the chloralose-anaesthetized cat. 139 neurones were excited synaptically and 25 non-synaptically by electrical stimulation of cardiac and pulmonary vagal branches. Synaptically excited neurones fall into two populations, one activated solely by myelinated afferent fibres and a second activated solely by non-myelinated afferent fibres. 94 neurones were synaptically excited by afferent fibres in a single vagal branch while 45 were excited by stimulation of two or three branches. Neurones responding to volleys in myelinated afferent fibres were located in both medial and lateral regions of the nucleus tractus solitarius whilst those excited by non-myelinated afferent fibres were restricted to the medial region. Consistent differences in the locations of neurones excited by stimulation of either cardiac or pulmonary or by single or several branches could not be distinguished.
摘要
在水合氯醛麻醉的猫的孤束核和迷走神经背运动核中，对164个神经元进行了细胞外记录。通过电刺激心脏和肺迷走神经分支，139个神经元受到突触兴奋，25个神经元受到非突触兴奋。突触兴奋的神经元分为两类，一类仅由有髓传入纤维激活，另一类仅由无髓传入纤维激活。94个神经元被单个迷走神经分支中的传入纤维突触兴奋，而45个神经元被两个或三个分支的刺激所兴奋。对有髓传入纤维中的冲动有反应的神经元位于孤束核的内侧和外侧区域，而被无髓传入纤维兴奋的神经元则局限于内侧区域。无法区分由心脏或肺部刺激或单个或多个分支刺激所兴奋的神经元在位置上的一致差异。
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