Bony labyrinth

From Wikipedia, the free encyclopedia

Bony labyrinth
Posterior Canal Superior Canal Utricle Horizontal Canal Vestibule Cochlea Saccule
Right osseous labyrinth. Lateral view.
Latin	labyrinthus osseus.
Gray's	subject #232 1047
Dorlands/Elsevier	l_01/12474340

The bony labyrinth (osseous labyrinth)located in the Inner Ear consists of three parts:

• vestibule
• semicircular canals
• cochlea

These are cavities hollowed out of the substance of the bone, and lined by periosteum; they contain a clear fluid, the perilymph, in which the membranous labyrinth is situated.

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 As such, some of the information contained herein may be outdated.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.

v • d • e Sensory system: Auditory system

Outer ear: Pinna (Helix, Antihelix, Tragus, Antitragus, Earlobe) - Ear canal Middle ear: Eardrum - Ossicles (Malleus, Incus & Stapes) - Stapedius - Tensor tympani - Eustachian tube (Torus tubarius) Inner ear/Labyrinth: Bony labyrinth - Membranous labyrinth - Cochlea (Cochlear duct, Scala vestibuli, Scala media & Scala tympani) - Oval window - Helicotrema - Round window - Basilar membrane - Reissner's membrane - Organ of Corti - Hair cells - Stereocilia - Sulcus spiralis externus - Sulcus spiralis internus - Tectorial membrane - Vestibule Brain: Cochlear nerve VIII → Cochlear nuclei → Superior olivary nuclei → Lateral lemniscus → Inferior colliculi → Medial geniculate nuclei → Primary auditory cortex