A study of the autonomic innervations in the middle ear, eustachian tube and pharynx.
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概要
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Autonomic innervations of the mucosa in the middle ear, Eustachian tube and pharynx were investigated by retrograde labelling of the autonomic ganglia with horseradish peroxidase (HRP). Of the sympathetic ganglia, the superior cervical ganglion (SCG), middle cervical ganglion (MCG) and stellate ganglion (StG) were examined, and of the parasympathetic ganglia, the pterygopalatine ganglion (PpG) and the otic ganglion (OtG) were examined.1. The sympathetic innervation of the middle ear mucosa was by fibers originating in the ipsilateral SCG, but not by those originating in the MCG or StG. The parasympathetic innervation was by fibers originating in the ipsilateral PpG, but not by those originating in the OtG.2. The sympathetic innervation of the Eustachian tube mucosa was by fibers originating in the ipsilateral SCG and MCG, but not by those from the StG; parasympathetic innervation was by fibers originating in the ipsilateral PpG, but not by those from the OtG.3. The epipharynx received sympathetic innervation from the ipsilateral SCG, but not from the MCG or StG. Its parasympathetic innervation was from the PpGs bilaterally, but not from the OtG.4. The sympathetic innervation of the mesopharynx was from the SCG, MCG and StG, but the parasympathetic supply was from neither the PpG nor the OtG. Sympathetic innervation was bilateral, but predominantly from the ipsilateral side.5. The hypopharynx resembled the mesopharynx, but had more innervation from the MCG and StG.