Modiolus (cochlea)

Modiolus
Interior of right osseous labyrinth. (Modiolus not labeled, but is represented at the axis of the spiral of the cochlea at the right.)
Details
Identifiers
Latin	Modiolus, columella cochleae
Dorlands /Elsevier	m_18/12538612
TA	A15.3.03.038
FMA	61278
*Anatomical terminology* [edit on Wikidata]

The modiolus is a conical shaped central axis in the cochlea. It consists of spongy bone and the cochlea turns approximately 2.5 times around it.^[1] The spiral ganglion is situated inside it.

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

↑ Thieme Atlas of Anatomy

External links

Anatomy of hearing and balance

Outer ear

Auricle
- helix
- antihelix
- tragus
- antitragus
- intertragic notch
- earlobe
Ear canal
Auricular muscles
Eardrum
- umbo
- pars flaccida

Middle ear

Tympanic cavity	Medial structures oval window round window secondary tympanic membrane prominence of facial canal promontory of tympanic cavity Posterior structures mastoid cells aditus to mastoid antrum pyramidal eminence

Ossicles	Malleus superior ligament lateral ligament anterior ligament Incus superior ligament posterior ligament Stapes annular ligament Muscles stapedius tensor tympani

Auditory tube / Eustachian tube	Torus tubarius

Inner ear/
(membranous labyrinth,
bony labyrinth)

Auditory system/
Cochlear labyrinth

General cochlea	Vestibular duct Helicotrema Tympanic duct Modiolus Cochlear cupula

Perilymphatic space	Perilymph Cochlear aqueduct

Cochlear duct / scala media	Reissner's/vestibular membrane Basilar membrane Reticular membrane Endolymph Stria vascularis Spiral ligament Organ of Corti stereocilia tip links Tectorial membrane Sulcus spiralis externus internus Spiral limbus

Cells	Claudius cell Boettcher cell

Vestibular system/
Vestibular labyrinth

Vestibule	Utricle macula Saccule macula Kinocilium Otolith Vestibular aqueduct endolymphatic duct endolymphatic sac Ductus reuniens

Semicircular canals	Superior semicircular canal Posterior semicircular canal Horizontal semicircular canal Ampullary cupula Ampullae crista ampullaris

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