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Morphology of intraepithelial corpuscular nerve endings in the nasal respiratory mucosa of the dog

Published online by Cambridge University Press:  01 November 1998

Y. YAMAMOTO ,
A. KONDO ,
Y. ATOJI ,
H. TSUBONE  and
Y. SUZUKI
Y. YAMAMOTO
Affiliation:
Laboratory of Veterinary Anatomy, Faculty of Agriculture, Gifu University, Gifu, Japan
A. KONDO
Affiliation:
Laboratory of Veterinary Anatomy, Faculty of Agriculture, Gifu University, Gifu, Japan
Y. ATOJI
Affiliation:
Laboratory of Veterinary Anatomy, Faculty of Agriculture, Gifu University, Gifu, Japan
H. TSUBONE
Affiliation:
Department of Comparative Pathophysiology, Graduate School of Agriculture and Life Sciences, Tokyo University, Tokyo, Japan
Y. SUZUKI
Affiliation:
Laboratory of Veterinary Anatomy, Faculty of Agriculture, Gifu University, Gifu, Japan
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Abstract

Corpuscular nerve endings in the nasal respiratory mucosa of the dog were investigated by immunohistochemical staining specific for protein gene product 9.5 by light and electron microscopy. In the nasal respiratory mucosa, complex corpuscular endings, which displayed bulbous, laminar and varicose expansions, were distributed on the dorsal elevated part of the nasal septum and on the dorsal nasal concha. The endings were 300–500 μm long and 100–250 μm wide. Some axons gave rise to a single ending while others branched into 2 endings. Cryostat sections revealed that the corpuscular endings were located within the nasal respiratory epithelium. On electron microscopy, immunoreactive nerve terminals that contained organelles, including mitochondria and neurofilaments, were observed within the epithelial layer near the lumen of the nasal cavity. Some terminals contacted the goblet cell. Such terminal regions were covered by the cytoplasmic process of ciliated cells and were never exposed to the lumen of the nasal cavity. These nerve endings are probably activated by pressure changes.

Keywords

Sensory nerve endingsmechanoreceptors
Type
Research Article
Information
The Journal of Anatomy , Volume 193 , Issue 4 , November 1998 , pp. 581 - 586
Copyright
© Anatomical Society of Great Britain and Ireland 1998

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