The modiolus is the conical central axis or pillar of the cochlea.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

Occupying the spiral canal of the modiolus is the spiral ganglion of the cochlea (ganglion of Corti) (Fig. 933), consisting of bipolar nerve cells, which constitute the cells of origin of this nerve.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

The modiolus diminishes rapidly in size in the second and succeeding coil.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

The bony canal of the cochlea takes two turns and three-quarters around the modiolus.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

The foramen centrale is continued into a canal which runs up the middle of the modiolus to its apex.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

From the spiral canal of the modiolus numerous canals pass outward through the osseous spiral lamina as far as its free edge.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

The modiolus and osseous spiral lamina of the cochlea are not preformed in cartilage but are ossified directly from connective tissue.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. The Organ of Hearing] Reference

The beginning of this canal is about 3 mm. in diameter; it diverges from the modiolus toward the tympanic cavity and vestibule, and presents three openings.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

The canals of the tractus spiralis foraminosus pass up through the modiolus and successively bend outward to reach the attached margin of the lamina spiralis ossea.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

The central ones pass down the modiolus and then through the foramina of the tractus spiralis foraminosus or through the foramen centrale into the lateral or outer end of the internal auditory meatus.    From Wordnik.com.  [IX. Neurology. 5h. The Acoustic Nerve] Reference

The cochlear branch subdivides into twelve or fourteen twigs, which traverse the canals in the modiolus, and are distributed, in the form of a capillary net-work, in the lamina spiralis and basilar membrane.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

The osseous spiral lamina (lamina spiralis ossea) is a bony shelf or ledge which projects from the modiolus into the interior of the canal, and, like the canal, takes two-and three-quarter turns around the modiolus.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

Here they become enlarged, and by their apposition form the spiral canal of the modiolus, which follows the course of the attached margin of the osseous spiral lamina and lodges the spiral ganglion (ganglion of Corti).    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

As already stated, the osseous spiral lamina extends only part of the distance between the modiolus and the outer wall of the cochlea, while the basilar membrane stretches from its free edge to the outer wall of the cochlea, and completes the roof of the scala tympani.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

In the recent state a membrane, the basilar membrane, stretches from the free border of this lamina to the outer wall of the bony cochlea and completely separates the canal into two passages, which, however, communicate with each other at the apex of the modiolus by a small opening named the helicotrema.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

The cochlear nerve (n. cochlearis) divides into numerous filaments at the base of the modiolus; those for the basal and middle coils pass through the foramina in the tractus spiralis foraminosis, those for the apical coil through the canalis centralis, and the nerves bend outward to pass between the lamellæ of the osseous spiral lamina.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference

It consists of a conical shaped central axis, the modiolus; of a canal, the inner wall of which is formed by the central axis, wound spirally around it for two turns and three-quarters, from the base to the apex; and of a delicate lamina, the osseous spiral lamina, which projects from the modiolus, and, following the windings of the canal, partially subdivides it into two.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth] Reference