Stapes

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Bone: Stapes
A. Left stapes. B. Base of stapes, medial surface.
Chain of ossicles and their ligaments, seen from the front in a vertical, transverse section of the tympanum.
Gray's	subject #231 1045
MeSH	A09.246.397.247.806

The stapes or stirrup is the stirrup-shaped small bone or ossicle in the middle ear which attaches the incus to the fenestra ovalis, the "oval window" which is adjacent to the vestibule of the inner ear. It is the smallest and lightest bone in the human body.

The stapes transmits the sound vibrations from the incus to the membrane of the inner ear inside the fenestra ovalis.

In non-mammalian vertebrates, the bone homologous to the stapes is usually called the columella; however, in reptiles, either term may be used.

[edit] Additional images

[edit] See also

• Bone terminology
• Terms for anatomical location

[edit] External links

• http://webpages.marshall.edu/~hurlburt/310lec13.html
• http://faculty.juniata.edu/yohn/reptilialab.htm
• http://www.lander.edu/rsfox/308cranial2Lec.html

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) • Stapedius • Tensor tympani • Eustachian tube (Torus tubarius)
Inner ear/Labyrinth	Bony labyrinth (Vestibule) • Membranous labyrinth Oval window • Helicotrema • Round window Cochlea: Spiral ganglion • Modiolus • Cochlear duct/scala media (Endolymph, Stria vascularis, Spiral ligament, Organ of Corti) • Scala vestibuli and Scala tympani (Perilymph) Reissner's/vestibular membrane • Basilar membrane • Tectorial membrane Organ of Corti: Hair cells • Stereocilia • Sulcus spiralis (externus, internus) • Limbus spiralis
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)
Brain (auditory)	Cochlear nerve VIII → Cochlear nuclei → Superior olivary nuclei → Lateral lemniscus → Inferior colliculi → Medial geniculate nuclei → Primary auditory cortex

1. REDIRECT Template:Bonesofskeletonar:عظمة الركاب

da:Stigbøjle (knogle) de:Steigbügel (Anatomie) es:Estribo (hueso) eo:Piedingo (anatomio) fr:Étrier (os) id:Tulang sanggurdinl:Stijgbeugel (gehoorbeentje)pt:Estribo (osso) sv:Stigbygeln

This page uses content from the English-language version of Wikipedia. The original article was at Stapes. The list of authors can be seen in the page history. As with Psychology Wiki, the text of Wikipedia is available under the GNU Free Documentation License.