open access

Vol 66, No 2 (2007)
ORIGINAL ARTICLES
Published online: 2007-03-09
Submitted: 2012-02-06
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Scanning electron microscopic observations on the third ventricular floor of the rat following cervical sympathectomy

T. Chacko Mathew
Folia Morphol 2007;66(2):94-99.

open access

Vol 66, No 2 (2007)
ORIGINAL ARTICLES
Published online: 2007-03-09
Submitted: 2012-02-06

Abstract

Various investigators have shown that unilateral ganglionectomy or transection of the internal and external carotid nerves leads to a regenerative response in the ipsilateral superior cervical ganglion and to uninjured mature sympathetic neurons sprouting into bilaterally innervated shared target organs. In this study changes in the supraependymal neuronal network following unilateral and bilateral cervical sympathectomy on the infundibular floor of the third ventricle were studied by scanning electron microscopy in comparison with normal and sham-operated control animals. After unilateral cervical sympathectomy there was a great increase in the number of varicose nerve fibres on the infundibular floor as compared to the normal and sham-operated control animals. Not only was there an increase in the number of nerve fibres, but also their varicosities were substantially larger than those normally present on the ependymal surface. This study indicates the possible sympathetic projections from the superior cervical ganglia to the ependymal surface of the third cerebral ventricle.

Abstract

Various investigators have shown that unilateral ganglionectomy or transection of the internal and external carotid nerves leads to a regenerative response in the ipsilateral superior cervical ganglion and to uninjured mature sympathetic neurons sprouting into bilaterally innervated shared target organs. In this study changes in the supraependymal neuronal network following unilateral and bilateral cervical sympathectomy on the infundibular floor of the third ventricle were studied by scanning electron microscopy in comparison with normal and sham-operated control animals. After unilateral cervical sympathectomy there was a great increase in the number of varicose nerve fibres on the infundibular floor as compared to the normal and sham-operated control animals. Not only was there an increase in the number of nerve fibres, but also their varicosities were substantially larger than those normally present on the ependymal surface. This study indicates the possible sympathetic projections from the superior cervical ganglia to the ependymal surface of the third cerebral ventricle.
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Keywords

third cerebral ventricle; supraependymal nerve fibres; superior cervical ganglia; cervical sympathectomy; rat

About this article
Title

Scanning electron microscopic observations on the third ventricular floor of the rat following cervical sympathectomy

Journal

Folia Morphologica

Issue

Vol 66, No 2 (2007)

Pages

94-99

Published online

2007-03-09

Bibliographic record

Folia Morphol 2007;66(2):94-99.

Keywords

third cerebral ventricle
supraependymal nerve fibres
superior cervical ganglia
cervical sympathectomy
rat

Authors

T. Chacko Mathew

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