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A Study by the Horseradish Peroxidase Tracer Method

Shohaku Oyagi, MD; Juichi Ito, MD; Iwao Honjo, MD

Arch Otolaryngol Head Neck Surg. 1989;115(11):1358-1361.

Abstract
• Autonomic innervation of the mucosa in the pharynx was investigated by the horseradish peroxidase retrograde tracer method. The pharynx was divided into three regions, the epipharynx, mesopharynx, and hypopharynx. The epipharynx was sympathetically innervated by the fibers originating in the ipsilateral superior cervical ganglion and parasympathetically innervated by the fibers originating in the bilateral pterygopalatine ganglia. The mesopharynx and hypopharynx were sympathetically innervated by the fibers originating in the superior cervical, middle cervical, and stellate ganglia but not innervated by the pterygopalatine ganglion. The sympathetic innervation of the mesopharynx and hypopharynx was considered bilateral and predominant in the ipsilateral side. Comparing these two regions, the hypopharynx showed a tendency to be more innervated by the middle cervical and stellate ganglia.

(Arch Otolaryngol Head Neck Surg. 1989;115:1358-1361)

Author Affiliations
From the Department of Otolaryngology, Tenri Hospital (Dr Oyagi) and the Department of Otolaryngology, Faculty of Medicine, Kyoto University (Drs Ito and Honjo), Japan.

Footnotes
Accepted for publication April 13, 1989.

Reprint requests to Department of Otolaryngology, Tenri Hospital, Mishima-cho, Tenri, Nara 632, Japan (Dr Oyagi).

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