. Cunningham's Text-book of anatomy. Anatomy. GLOSSOPHAEYNGEAL NEEVE. 785 branch bo the genicular ganglion of the facial nerve. It then separates into three terminal branches which pierce the lamina cribrosa. (1) N. Utricularis.—The utricular nerve supplies the macula acustica of the utricle. (2) and (3) N. Ampullaris Superior et Lateralis.—The superior and lateral ampullary nerves supply the ampullar of the superior and lateral semicircular ducts. N. Cochleae.—The inferior or cochlear nerve gives off (1) n. saccularis, a saccular nerve to the macula acustica of the saccule, (2) n. ampullaris
. Cunningham's Text-book of anatomy. Anatomy. GLOSSOPHAEYNGEAL NEEVE. 785 branch bo the genicular ganglion of the facial nerve. It then separates into three terminal branches which pierce the lamina cribrosa. (1) N. Utricularis.—The utricular nerve supplies the macula acustica of the utricle. (2) and (3) N. Ampullaris Superior et Lateralis.—The superior and lateral ampullary nerves supply the ampullar of the superior and lateral semicircular ducts. N. Cochleae.—The inferior or cochlear nerve gives off (1) n. saccularis, a saccular nerve to the macula acustica of the saccule, (2) n. ampullaris inferior, an inferior ampullary nerve to the ampulla of the posterior semicircular duct, and (3) is continued through the lamina cribrosa to the labyrinth as the cochlear nerve, which is distri- buted through the modiolus and osseous spiral lamina to the organ of Corti in the cochlea. Both the vestibular and cochlear nerves contain among their fibres collections of nerve cells, forming in each nerve a distinct ganglion—the vestibular ganglion on the vestibular trunk, and the ganglion spirale or spiral ganglion of the cochlea on the cochlear trunk. JSTeevus Glossopharyngetjs. The ninth or glossopharyngeal nerve (Fig. 643, p. 768) arises from the brain by five or six fine fila radicularia (radicles) which emerge from the medulla oblongata between the olive and the resti- form body, close to the facial nerve above, and in series with the fila of the vagus nerve below (for the deep connexions, see p. 596). The fila combine to form a nerve which passes through the jugular fora- men, along with the vagus and accessory nerves, but enveloped in a separate sheath of dura mater (Fig. 647, p. 771). Eeaching the neck, the nerve arches downwards and forwards to the interval be- tween the hyoid bone and the mandible. It lies at first between the internal carotid artery and the internal jugular vein, and then be- tween the internal and external carotid arteries, in its course to the s
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