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Cochlear Division of the Acoustic Nerve

Part of the cochlear division of the acoustic nerve, highly magnified. (Henle.)

The cochlear nerve (n. cochlearis) divides into numerous filaments at the base of the modiolus; those for the basal and middle coils pass through the foramina in the tractus spiralis foraminosis, those for the apical coil through the canalis centralis, and the nerves bend outward to pass between the lamellæ of the osseous spiral lamina. Occupying the spiral canal of the modiolus is the spiral ganglion of the cochlea (ganglion of Corti) (Fig. 933), consisting of bipolar nerve cells, which constitute the cells of origin of this nerve. Reaching the outer edge of the osseous spiral lamina, the fibers of the nerve pass through the foramina in the tympanic lip; some end by arborizing around the bases of the inner hair cells, while others pass between Corti’s rods and across the tunnel, to end in a similar manner in relation to the outer hair cells. The cochlear nerve gives off a vestibular branch to supply the vestibular end of the ductus cochlearis; the filaments of this branch pass through the foramina in the fossa cochlearis (page 1048).

(Text modified from Gray's 1918 Anatomy)


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Reference

Gray H. Anatomy of the human body. (1918) Philadelphia: Lea & Febiger.


Cite this page: Hill, M.A. (2024, June 18) Embryology Gray0933.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Gray0933.jpg

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current08:14, 19 August 2012Thumbnail for version as of 08:14, 19 August 2012500 × 360 (54 KB)Z8600021 (talk | contribs)==Cochlear Division of the Acoustic Nerve== Part of the cochlear division of the acoustic nerve, highly magnified. (Henle.) The cochlear nerve (n. cochlearis) divides into numerous filaments at the base of the modiolus; those for the basal and middle co

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