Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 8 On the Ossicles That Enter Upon the Construction of the Organ of Hearing

Nerves from the fifth pair to the organ of hearing

The second nerve (D) [nervus vestibulocochlearis] of the fifth pair of cerebral nerves enters up into the foramen [meatus acusticus internus] facing the space where the brain is contained, and except for branches (E, F) running off from it through the narrower and thinner foramina [porus acusticus internus], with its greater portion (G; see also a, b, c, f of figs. 1 and 2, chapter 2, book 3) it covers like a membrane [labyrinthus membranaceus] the cavity cut into the temporal boneā€”not all of the cavity, but only certain parts, as if that portion of the nerve were divided into several membranes covering some regions of this cavity. Among the remaining areas of this cavity, which vary and are flat in one place and in another porous [paries mastoideus] like fine sponge or pumice, one is spherical and smooth (H), hedged off by a slightly swelling bony circle [promontorium?].



Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 8 On the Ossicles That Enter Upon the Construction of the Organ of Hearing