Methods | Statistics | Clinical | Educational | Industrial |
Professional items | World psychology | |Vestibule of the ear|
|Chain of ossicles and their ligaments, seen from the front in a
vertical, transverse section of the tympanum. (Vestibule visible
at center right.)| |Gray's||subject #232 1047| The vestibule is
the central part of the osseous labyrinth, and is situated
medial to the tympanic cavity, behind the cochlea, and in front
of the semicircular canals. It is somewhat ovoid in shape, but
flattened transversely; it measures about 5 mm. from before
backward, the same from above downward, and about 3 mm. across.
On its medial wall, at the forepart, is a small circular
depression, the recessus sphæricus, which is perforated, at its
anterior and inferior part, by several minute holes (macula
cribrosa media) for the passage of filaments of the acoustic
nerve to the saccule; and behind this depression is an oblique
ridge, the crista vestibuli, the anterior end of which is named
the pyramid of the vestibul