A text-book on diseases of the ear, nose and throat . the Eustachiantube, into the tympanic ill-advised, therefore, areall forms of inflation of thedrum-cavities in tuberculoussubjects ! On account of the anatom-ical relations of the middle ear,and the grave results of diseaseof this part of the body, es-pecially in children, this organbecomes of great imiDortance toall practitioners of medicine;yet there is no part of thehuman body so little understood by most physicians. The reflex action concerned in the ]3urulent otitis media of teethingdeserves our consideration. A considerable
A text-book on diseases of the ear, nose and throat . the Eustachiantube, into the tympanic ill-advised, therefore, areall forms of inflation of thedrum-cavities in tuberculoussubjects ! On account of the anatom-ical relations of the middle ear,and the grave results of diseaseof this part of the body, es-pecially in children, this organbecomes of great imiDortance toall practitioners of medicine;yet there is no part of thehuman body so little understood by most physicians. The reflex action concerned in the ]3urulent otitis media of teethingdeserves our consideration. A considerable i3ortion of the blood-supplyof the membrana tym^jani is derived from an artery that leaves the inter-nal carotid in the carotid canal, and proceeds by a very short coursedirectly to its destination. Being thus closely connected with a largearterial trunk, this small tympanal branch [Fig. 78, 9] of the internalcarotid artery possesses very favorable circumstances for a speedy aug-mentation of its blood-supply. Xow, the nervi vasorum constituting the. Nervous connection between the teeth and the ear.(Woakes.) V, 1, tympanic cavity 2, auricular branch ofauricula-temporal nerve ; 3, branch from the ganglionfurnishing vascular nerves to the internal carotid arteryand its branch the tympanic artery; 4, otic ganglion;5, branch from otic ganglion joining inferior dentalnerve; 6, middle meningeal artery; 7, auriculo-temporalnerve; 8, inferior dental nerve to teeth and gums; 9,short tymiianic branch of internal carotid arterj-. 1 Brit. Med. Journ., Xovember 16, 1895. 160 DISEASES OF THE EAR. carotid plexus at this part of its course come largely from the otic gan-glion [Fig. 78^ 3]. The third branch of the fifth nerve is cut through inthe diagram to show this ganglion. On the other hand, the inferior dentalnerve [Fig. 78, 8] supplying the decayed tooth or gums, as the case maybe, also communicates with this ganglion [Fig. 78, 4, 5]. We thus arriveat a direct channel of nerve-communicati
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