The American journal of the medical sciences . frican ostrich, the lingual nerve,which, in its distribution, correspondswith, and undoubtedly is, the glosso-pharyngeal, no chiasma was detected inthe usual place, though it is possiblethat it may have been accidentally de-stroyed in the removal of the right and left nerves, after havingsupplied the muscles and mucous sur-faces of the larynx, advance to the tipof the tongue, where they anastomosevery freely, the two trunks forming acontinuous arched nerve across the mid-dle line. The hypoglossal nerve differs quiteremarkably from the s
The American journal of the medical sciences . frican ostrich, the lingual nerve,which, in its distribution, correspondswith, and undoubtedly is, the glosso-pharyngeal, no chiasma was detected inthe usual place, though it is possiblethat it may have been accidentally de-stroyed in the removal of the right and left nerves, after havingsupplied the muscles and mucous sur-faces of the larynx, advance to the tipof the tongue, where they anastomosevery freely, the two trunks forming acontinuous arched nerve across the mid-dle line. The hypoglossal nerve differs quiteremarkably from the same part in theother animals here described. Thenerves (Fig. IL, 1) following the hornsof the hyoid bone (c), converge towards the body of it {d), and betweenthe bases of the horns, and on the under or fore side of the body, form avery short, but perfectly distinct and symmetrical chiasma, measuring onlythe one-tenth of an inch in length. From each angle of it a nerve passesforwards, the branches of which are distributed to the muscles of the. Nerves of the Tongue and Larynx in theGoose.—a, the tongue ; h, the larynx: e, thelong tracheal muscles; d, the trachea; 1,glosso-pharyngeal nerve ; 2, branch to thesalivary gland ; 3, upper laryngeal nerve anddecussation; 4, bi-anch to laryngeal muscles;5 and 6, the two decussations of hypoglossal. 1864.] Wyman, Passage of Nerves across Middle Line of Body. 347 tongue. This structure and distribution of the hypoglossus in the ostrichresembles that of the same nerve described by Yogt as existing in the alli-gator.^ Fig. II. Fig. III.
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