The foramen for the exit of the chorda tympani nerve from the middle ear is also associated with this wall (Fig. 8.120).
The labyrinthine (medial) wall of the middle ear is also the lateral wall of the internal ear. A prominent structure on this wall is a rounded bulge (the promontory) produced by the basal coil of the cochlea, which is an internal ear structure involved with hearing (Fig. 8.120).