Stapes
From Wikipedia, the free encyclopedia
| Bone: Stapes | ||
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| A. Left stapes. B. Base of stapes, medial surface. | ||
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| Chain of ossicles and their ligaments, seen from the front in a vertical, transverse section of the tympanum. | ||
| Bones and muscles in the tympanic cavity in the middle ear | ||
| Gray's | subject #231 1045 | |
| Precursor | 2nd branchial arch[1] | |
| MeSH | Stapes | |
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.
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[edit] Additional images
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 The medial wall and part of the posterior and anterior walls of the right tympanic cavity, lateral view. |
[edit] See also
[edit] References
[edit] External links
- http://webpages.marshall.edu/~hurlburt/310lec13.html
- http://faculty.juniata.edu/yohn/reptilialab.htm
| Bones |
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| VERTEBRAL COLUMN: vertebrae (cervical C1 C2 C7 - thoracic - lumbar) - sacrum - coccyx
cranial bones of SKULL: occipital - parietal - frontal - temporal - sphenoid - ethmoid facial bones of SKULL nasal - maxilla - lacrimal - zygomatic - palatine - inferior nasal conchae - vomer - mandible - hyoid (greater cornu, lesser cornu, body) UPPER EXTREMITY: clavicle - scapula - humerus - ulna - radius carpals (scaphoid - lunate bone - triquetral - pisiform - trapezium - trapezoid - capitate - hamate) - metacarpals - phalanges (prox - int - dist) LOWER EXTREMITY: pelvis (ilium, ischium, pubis) - femur - patella - fibula - tibia tarsals (calcaneus - talus - navicular - cuneiform - cuboid ) - metatarsals - phalanges (prox - int - dist) |
