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Henry Gray (1825–1861).  Anatomy of the Human Body.  1918.
 
filaments of the acoustic nerve enter these parts, and having pierced the outer and middle layers, they lose their medullary sheaths, and their axis-cylinders ramify between the hair cells.


FIG. 925– Right human membranous labyrinth, removed from its bony enclosure and viewed from the antero-lateral aspect. (G. Retzius.) (See enlarged image)



FIG. 926– The same from the postero-medial aspect. 1. Lateral semicircular canal; 1’, its ampulla; 2. Posterior canal; 2’, its ampulla. 3. Superior canal; 3’, its ampulla. 4. Conjoined limb of superior and posterior canals (sinus utriculi superior). 5. Utricle. 5’. Recessus utriculi. 5”. Sinus utriculi posterior. 6. Ductus endolymphaticus. 7. Canalis utriculosaccularis. 8. Nerve to ampulla of superior canal. 9. Nerve to ampulla of lateral canal. 10. Nerve to recessus utriculi (in Fig. 925, the three branches appear conjoined). 10’. Ending of nerve in recessus utriculi. 11. Facial nerve. 12. Lagena cochleæ. 13. Nerve of cochlea within spiral lamina. 14. Basilar membrane. 15. Nerve fibers to macula of saccule. 16. Nerve to ampulla of posterior canal. 17. Saccule. 18. Secondary membrane of tympanum. 19. Canalis reuniens. 20. Vestibular end of ductus cochlearis. 23. Section of the facial and acoustic nerves within internal acoustic meatus (the separation between them is not apparent in the section). (G. Retzius.) (See enlarged image)


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