vestibuli

In its lateral or tympanic wall is the fenestra vestibuli, closed, in the fresh state, by the base of the stapes and annular ligament.

X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth 1918

In front is an elliptical opening, which communicates with the scala vestibuli of the cochlea.

X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth 1918

From the posterior wall a canal, the ductus endolymphaticus, is given off; this duct is joined by the ductus utriculosaccularis, and then passes along the aquæductus vestibuli and ends in a blind pouch (saccus endolymphaticus) on the posterior surface of the petrous portion of the temporal bone, where it is in contact with the dura mater.

X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth 1918

On the upper wall or roof is a transversely oval depression, the recessus ellipticus, separated from the recessus sphæricus by the crista vestibuli already mentioned.

X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth 1918

As the hinder part of the medial wall is the orifice of the aquæductus vestibuli, which extends to the posterior surface of the petrous portion of the temporal bone.

X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth 1918

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 vestibule.

X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth 1918

They comprise the mons pubis, the labia majora et minora pudendi, the clitoris, the bulbus vestibuli, and the greater vestibular glands.

XI. Splanchnology. 3d. The Female Genital Organs 1918

The Bulb of the Vestibule (bulbus vestibuli; vaginal bulb) is the homologue of the bulb and adjoining part of the corpus cavernosum urethræ of the male, and consists of two elongated masses of erectile tissue, placed one on either side of the vaginal orifice and united to each other in front by a narrow median band termed the pars intermedia.

XI. Splanchnology. 3d. 5. The External Organs 1918

It reaches about half-way toward the outer wall of the tube, and partially divides its cavity into two passages or scalæ, of which the upper is named the scala vestibuli, while the lower is termed the scala tympani.

X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth 1918

Its ampullated end corresponds to the upper and lateral angle of the vestibule, just above the fenestra vestibuli, where it opens close to the ampullated end of the superior canal; its opposite end opens at the upper and back part of the vestibule.

X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth 1918