Stapes

From Free net encyclopedia

Template:Infobox Bone 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.

See also

• Bone terminology
• Terms for anatomical location

External links

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

Sensory system - Auditory system - edit

Outer ear: Pinna | Ear canal  Middle ear: Eardrum | Ossicles (Malleus, Incus & Stapes) | Stapedius | Tensor tympani | Eustachian tube Inner ear: Cochlea (Scala vestibuli, Scala media & Scala tympani) | Oval window | Helicotrema | Round window | Basilar membrane | Reissner's membrane | Organ of Corti | Hair cells | Stereocilia Brain: Cochlear nerve VIII → Cochlear nuclei → Superior olivary nuclei → Inferior colliculi → Medial geniculate nuclei → Primary auditory cortex

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