A text-book on diseases of the ear, nose and throat . t the junction of the carti-laginous with the bony canal, wherethey average as many as ten to thesquare millimetre. According to Bu-chanan, there are from one to twothousand wax glands in each auditorycanal. The skin in the cartilaginouspart of the auditory canal is one andone-half millimetres thick. Vessels and Nerves.—The arteriessupplying the auditory canal arebranches from the posterior auricular, internal maxillary, and temporalbranches of the external carotid artery. The nerves are chiefly derivedfrom the temporo-auricular branch of t
A text-book on diseases of the ear, nose and throat . t the junction of the carti-laginous with the bony canal, wherethey average as many as ten to thesquare millimetre. According to Bu-chanan, there are from one to twothousand wax glands in each auditorycanal. The skin in the cartilaginouspart of the auditory canal is one andone-half millimetres thick. Vessels and Nerves.—The arteriessupplying the auditory canal arebranches from the posterior auricular, internal maxillary, and temporalbranches of the external carotid artery. The nerves are chiefly derivedfrom the temporo-auricular branch of the inferior maxillary nerve. Thereis also an auricular hranch of the pneumogastric nerve. The plexus of thesympathetic nerve, distributed to the external carotid artery, communi-cates with the otic and submaxillary ganglia by means of the plexusdistributed to the facial and internal maxillary arteries. Relation of the Fallopian Canal to the External Auditory Canal.—Accord-ing to Gelle (Annales des Maladies de V Oreille, etc., January, 1894), the. The auricle and tlie cartilaginous partof the external auditory canal, left side.(Politzer.) a, cartilaginous meatus; 6, innerpointed end which unites with the osseouspart of the auditory canal; c, c, fissures ofSantorini. ANATOMY AND PHYSIOLOGY OF EXTERNAL AUDITORY CANAL. 15 Fallopian canal, on its way from the drnm-cavity to the stylomastoidforamen, crosses the posterior edge of the ring of the membrana tympaniat a point where a line drawn horizontally through the nmho of the mem-brana reaches the posterior wall of the osseous auditory canal. At thispoint the Fallopian canal is only from two to three millimetres from thesurface of the posterior wall of the auditory canal. The extra-tympanicportion of the Fallopian canal continues to be superficial in the posteriorwall of the auditory canal for a distance of five millimetres, being in thistract from three to four millimetres from the surface. Then the canalpasses deeper inward and
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