Modiolus (cochlea)

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Modiolus (cochlea)
Interior of right osseous labyrinth. (Modiolus not labeled, but is represented at the axis of the spiral of the cochlea at the left.)
Gray's	subject #232 1050
Dorlands/Elsevier	m_18/12538612

The modiolus is a conical shaped central axis in the cochlea. The Modiolus consists of spongy bone and the cochlea turns approximately 2.75 times around the modiolus The spiral ganglion is situated inside the bony modiolus.

[edit] External links

• Modiolus at eMedicine Dictionary
• http://www.univ-brest.fr/S_Commun/Biblio/ANATOMIE/Web_anat/Tete_Cou/Oreille/Modiolus.jpg
• http://www.kumc.edu/instruction/medicine/anatomy/histoweb/eye_ear/ear01.htm

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

This anatomy article is a stub. You can help Wikipedia by expanding it.

v • d • e Sensory system: Auditory and Vestibular systems Outer ear Pinna (Helix, Antihelix, Tragus, Antitragus, Earlobe) • Ear canal Middle ear Eardrum (Umbo) • Ossicles (Malleus, Incus & Stapes) • muscles (Stapedius, Tensor tympani) • Eustachian tube (Torus tubarius) Inner ear/Labyrinth Bony labyrinth (Vestibule) • Membranous labyrinth Oval window → Scala vestibuli / Reissner's/vestibular membrane, Helicotrema and Scala tympani / Basilar membrane (Perilymph) → Round window Cochlea: Modiolus • Cochlear duct / scala media (Endolymph, Stria vascularis, Spiral ligament, Organ of Corti), Olivocochlear system Organ of Corti: Stereocilia • Sulcus spiralis (externus, internus) • Limbus spiralis to brain (auditory) Tectorial membrane → Hair cells → Spiral ganglion → Cochlear nerve VIII → Cochlear nuclei → Trapezoid body → Superior olivary nuclei → Lateral lemniscus → Inferior colliculi → Medial geniculate nuclei → Auditory radiations → Primary auditory cortex Vestibular system Static/translations: Utricle (Macula) – Saccule (Macula, Endolymphatic sac, Endolymphatic duct) – Kinocilium – Otolith Kinetic/rotations: Semicircular canals (Superior, Posterior, Horizontal) • Cupula • Ampullae (Crista ampullaris) to brain (vestibular) Vestibular nerve VIII → Vestibular nuclei, Flocculonodular lobe Vestibular nuclei → Vestibulospinal tract, Ventral posterolateral nucleus → Vestibular cortex

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• This page was last modified 23:19, 28 May 2008 by Anonymous user(s) of Wikipedia. Based on work by Wikipedia user(s) Magnusig and Arcadian.
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