Re-evaluation and quantification of the different sources of nerve fibres supplying the rat eye

Carlo Cavallotti, Alessandro Frati, Paolo Sagnelli, Nicola Pescosolido

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The denervation and/or the removal of peripheral nerve ganglia are useful surgical techniques for studying the source and distribution of peripheral nerves in all organs, including the eye. The amount and distribution of the remaining nerve fibres supplying the eye (after sectioning of various types of nervous fibres and/or removal of nerve ganglia) were evaluated in the rat. Male Sprague-Dawley rats were anaesthetized and one or more of the following nervous tissues were removed: superior cervical ganglion, main ciliary ganglion, pterygopalatine ganglion, trigeminal ganglion and the ophthalmic-maxillary nerve. In some animals, chemical sympathectomy was performed by administration of 6-OH dopamine. The eyes were cut in serial sections, but only three regions (cornea, iris and choroid) were harvested and submitted for various nerve fibre staining techniques. The results were quantified and statistically analysed. Superior cervical ganglionectomy and/or chemical sympathectomy induced the destruction of almost all the catecholaminergic nerve fibres in the three examined regions of the rat eye. Removal of the ciliary ganglion (partial parasympathectomy) caused the destruction of about 60% of the cholinergic nerve fibres of the same regions of the rat eye, while subtotal parasympathectomy destroyed about 80% of the cholinergic nerve fibres. Surgical transsection of the ophthalmo-maxillary nerve or the removal of the trigeminal ganglion led to a degeneration of almost all sensitive nerve fibres of the three examined regions of the rat eye. The denervation experiments confirmed the presence of the different types of nerve fibres (sympathetic, parasympathetic and sensitive) in the three studied structures of the rat eye.

Original languageEnglish
Pages (from-to)217-224
Number of pages8
JournalJournal of Anatomy
Volume206
Issue number3
DOIs
Publication statusPublished - Mar 2005

Fingerprint

nerve fibers
Nerve Fibers
eyes
Parasympathetic Ganglia
rats
Parasympathectomy
Maxillary Nerve
Cholinergic Fibers
Chemical Sympathectomy
Trigeminal Ganglion
nerve tissue
Denervation
peripheral nerves
Peripheral Nerves
cholinergic agents
Ganglia
Ophthalmic Nerve
Ganglionectomy
Nerve Tissue
Superior Cervical Ganglion

Keywords

  • Eye
  • Nerve section
  • Nervous ganglia removal
  • Ocular peripheral ganglia
  • Parasympathectomy
  • Sympathectomy

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Anatomy

Cite this

Re-evaluation and quantification of the different sources of nerve fibres supplying the rat eye. / Cavallotti, Carlo; Frati, Alessandro; Sagnelli, Paolo; Pescosolido, Nicola.

In: Journal of Anatomy, Vol. 206, No. 3, 03.2005, p. 217-224.

Research output: Contribution to journalArticle

Cavallotti, Carlo ; Frati, Alessandro ; Sagnelli, Paolo ; Pescosolido, Nicola. / Re-evaluation and quantification of the different sources of nerve fibres supplying the rat eye. In: Journal of Anatomy. 2005 ; Vol. 206, No. 3. pp. 217-224.
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