Fig. 44-10. The cochlea, lateral aspect. A, Modiolus. B, Modiolus with the addition of the osseous spiral lamina. C, The cochlea, showing the basilar membrane, cochlear duct, and osseous labyrinth. D, Section through the cochlea, showing the scala vestibuli, scala tympani, cochlear duct, and spiral ganglion. An arrow is placed in the helicotrema. (After Wolff et al.) 1 to 3, basal, middle, and apical coils, respectively, of cochlea; 8, cochlear nerve; B.M., basilar membrane; CO., cochlear duct; I.A.M., internal acoustic meatus. Click for high resolution image.

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