Elsevier

Brain Research

Volume 241, Issue 1, 3 June 1982, Pages 43-48
Brain Research

Some characteristics of sympathetic preganglionic Neurones in the rat

https://doi.org/10.1016/0006-8993(82)91226-4Get rights and content

Abstract

In anaesthetized rats sympathetic preganglionic neurons (SPN) were identified by their antidromic response to stimulation of the ipsilateral cervical sympathetic trunkk (CST). Units were recorded at a depth of 0.75–1.1 mm from the dorsal surface of the spinal cord. The majority of SPN had axonal conduction velocities less than 1 m/s. Units could be routinely held for periods of up to 1 h. Spontaneously active SPN had discharge rates within the range 0.3–8.0 Hz.

Application of horseradish peroxidase (HRP) to the central cut end of the CST resulted in the labelling of neurones only on the ipsilateral side, mainly in the intermediolateral cell column (IML) and the lateral funiculus and between the first and third thoracic (T) segments.

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This work has been reported in part as a communication to the Physiological Society, London

***

On leave of absence from Department of Physiology, Faculty of Medicine, Oral Roberts University, Tulsa, Oklahamo, U.S.A.

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