Fine structure, origin, and distribution density of the autonomic nerve endings in the tarsal muscle in the eyelid of the mouse

Cell and Tissue Research
T Yamashita, R Honjin

Abstract

The fine structure, origin, and distribution density of the autonomic nerve endings in the tarsal muscle of the mouse were studied by histochemistry and electron microscopy. With histochemical methods, the fine nerve plexus in the normal muscle shows both catecholamine-positive varicose fibers and acetylcholinesterase-active varicose fibers. The former are distributed more densely than the latter. After superior cervical ganglionectomy, the catecholamine-positive fibers disappear, while after pterygopalatine ganglionectomy, the acetylcholinesterase-active fibers vanish. In electron micrographs, the varicosities appear as expansions containing many synaptic vesicles. The axonal expansions partly lack a Schwann sheath and directly face the pinocytotic vesicle-rich zones of the smooth muscle cells. A relatively wide space, 0.1 to 1.0 microns in width, lies between nerve expansion and muscle cell. The expansions can be classified into two types: Type I having small granular synaptic vesicles, and Type II having agranular vesicles instead of small granular synaptic vesicles. Type I undergoes degeneration after superior cervical ganglionectomy, while Type II degenerates after pterygopalatine ganglionectomy. This indicates that Type I...Continue Reading

Citations

Sep 1, 1990·Journal of the Autonomic Nervous System·P G SmithH Reddy
Oct 1, 1995·International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience·J Hiebert, P G Smith
Jul 1, 1994·Journal of Chemical Neuroanatomy·E Simons, P G Smith
Mar 26, 2002·Autonomic Neuroscience : Basic & Clinical·Peter G SmithWohaib Hasan
May 9, 2012·Current Eye Research·Roberta M da Silva CostaJoseph L Demer
Nov 20, 2019·Ophthalmic Plastic and Reconstructive Surgery·Ivan VrcekTanuj Nakra
Jan 29, 1996·The Journal of Comparative Neurology·P G Smith, Q Fan

Related Concepts

Adrenergic Fibers
Metazoa
Axon
Cholinergic Fibers
Eyelid Structure
Cytochemistry
Mice, Inbred Strains
Electron Microscopy
Muscle
Mouse, Swiss

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