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Arrangement and number of intralaryngeal ganglia and ganglionic neurons: comparative study of five species of mammals

Published online by Cambridge University Press:  29 June 2007

Takatsugu Shimazaki ,
Yoshikazu Yoshida  and
Minoru Hirano
Takatsugu Shimazaki*
Affiliation:
Department of Otorhinolaryngology and Head and Neck Surgery, School of Medicine, Kurume University, Kurume, Japan.
Yoshikazu Yoshida
Affiliation:
Department of Otorhinolaryngology and Head and Neck Surgery, School of Medicine, Kurume University, Kurume, Japan.
Minoru Hirano
Affiliation:
Department of Otorhinolaryngology and Head and Neck Surgery, School of Medicine, Kurume University, Kurume, Japan.
*
Dr Takatsugu Shimazaki, Department of Otolaryngology and Head and Neck Surgery, School of Medicine, Kurume University, 67 Asahimachi, Kurume 830, Japan.
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Abstract

The arrangement and number of intralaryngeal ganglia and their neurons in five mammals (dog, rat, guinea pig, rabbit and cat) were examined morphologically. Intralaryngeal ganglions were situated mainly in branches of the internal branch of superior laryngeal nerve (Int-SLN), dorsal and/or dorsolateral to the posterior cricoarytenoid muscle, and around the inferior laryngeal nerve in dogs, rats, guinea pigs and cats, but they were identified at the branching out point ofthe Int-SLN exclusively in rabbits. The ganglion of each animal was spindle-shaped, with a surrounding fibrous capsule, and it contained many ganglionic neurons, vessels and connective tissue cells. The ganglionic neuron was oval-shaped and had a round nucleus: the diameter was smaller (20–25 μm) in the rat than in the other mammals (25–30 μm). More than 80 percent of ganglionic neurons occurred in the supraglottis of all the animals except the rat. In the rat, this value was approximately 40 percent.

Keywords

LarynxGangliaMammals
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 109 , Issue 7 , July 1995 , pp. 622 - 629
Copyright
Copyright © JLO (1984) Limited 1995

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