Bony Labyrinth

The Bony labyrinth or osseous labyrinth is the rigid outer wall of the inner ear. It consists of three parts: the vestibule, semicircular canals, and 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 incorporates text from a public domain edition of Gray's Anatomy.

Sensory system: Auditory and Vestibular systems (TA A15.3, TH 3.11.09, GA 10.1029)
Outer ear
  • Pinna (Helix, Antihelix, Tragus, Antitragus, Incisura anterior auris, Earlobe)
  • Ear canal
  • Auricular muscles
  • Eardrum (Umbo
  • Pars flaccida)
Middle ear
Tympanic cavity
  • Labyrinthine wall/medial: Oval window
  • Round window
  • Secondary tympanic membrane
  • Prominence of facial canal
  • Promontory of tympanic cavity
  • Membranous wall/lateral
  • Mastoid wall/posterior: Mastoid cells
  • Aditus to mastoid antrum
  • Pyramidal eminence
  • Carotid wall/anterior
  • Tegmental wall/roof: Epitympanic recess
  • Jugular wall/floor
Ossicles
  • Malleus (Neck of malleus, Superior ligament of malleus, Lateral ligament of malleus, Anterior ligament of malleus)
  • Incus (Superior ligament of incus, Posterior ligament of incus)
  • Stapes (Anular ligament of stapes)
Muscles
  • Stapedius
  • Tensor tympani
Eustachian tube
  • Bony part of pharyngotympanic tube
  • Cartilage of pharyngotympanic tube (Torus tubarius)
Inner ear/
(membranous labyrinth,
bony labyrinth)
Auditory system
Cochlear labyrinth
General cochlea
  • Scala vestibuli
  • Helicotrema
  • Scala tympani
  • Modiolus
  • Cochlear cupula
Perilymphatic space
  • Perilymph
  • Cochlear aqueduct
Cochlear duct /
scala media
  • Reissner's/vestibular membrane
  • Basilar membrane
  • Endolymph
  • Stria vascularis
  • Spiral ligament
  • Organ of Corti: Stereocilia
  • Tectorial membrane
  • Sulcus spiralis (externus, internus)
  • Spiral limbus
Cells
  • Claudius cell
  • Boettcher cell
Vestibular system/
Vestibular labyrinth
  • Static/translations/vestibule/endolymphatic duct: Utricle (Macula)
  • Saccule (Macula, Endolymphatic sac)
  • Kinocilium
  • Otolith
  • Vestibular aqueduct
  • Canalis reuniens
  • Kinetic/rotations: Semicircular canals (Superior, Posterior, Horizontal)
  • Ampullary cupula
  • Ampullae (Crista ampullaris)

M: EAR

anat (e/p)/phys/devp

noco/cong, epon

proc, drug (S2)

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