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Efferent Fibres to the Aortic Bodies: A search for Their Cell Bodies in the Brainstem of the Cat and Rabbit
Author(s) -
Kidd C.,
McWilliam P. N.
Publication year - 1980
Publication title -
quarterly journal of experimental physiology and cognate medical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 101
eISSN - 1469-445X
pISSN - 0033-5541
DOI - 10.1113/expphysiol.1980.sp002498
Subject(s) - efferent , nucleus ambiguus , horseradish peroxidase , brainstem , anatomy , cats , axoplasmic transport , cell bodies , nucleus , biology , dorsal motor nucleus , efferent neuron , central nervous system , chemistry , vagus nerve , afferent , medulla oblongata , neuroscience , medicine , stimulation , biochemistry , enzyme
An attempt has been made to determine where in the lower brainstem the cell bodies of nonsympathetic efferent fibres in the aortic nerve of the cat and rabbit are located. Horseradish peroxidase (HRP) was placed on the central end of the right cut aortic nerve of anaesthetized animals and, after an appropriate time, sections of the brainstem encompassing the rostral and caudal limits of the dorsal vagal motor nucleus and nucleus ambiguus were examined microscopically for retrogradely transported HRP. Cell bodies labelled by exogenous HRP were not found in any of the cats or rabbits exposed to HRP although reaction product, due to an endogenous response, was observed. Appropriate control experiments were performed to show that the sensitivity of the technique for demonstrating HRP in our hands was adequate. We conclude that the cell bodies of efferent fibres, of non sympathetic origin, in the aortic nerve are likely to be located outside the central nervous system.