Semicircular canals
The semicircular canals are three semicircular interconnected tubes located in the innermost part of each ear, the inner ear. The three canals are the lateral, anterior and posterior semicircular canals. They are the part of the bony labyrinth, a periosteum-lined cavity on the petrous part of the temporal bone filled with perilymph.
| Semicircular canals | |
|---|---|
The internal ear, with "semicircular ducts" at left | |
Illustration showing a semicircular canal. The osseous structure contains its semicircular duct which is continuous to the membranous ampulla that contains hair cells, a cupula, vestibular nerve endings and endolymph fluid. | |
| Details | |
| Artery | stylomastoid artery, labyrinthine artery |
| Identifiers | |
| Latin | canalis semicircularis ductus semicircularis |
| MeSH | D012665 |
| TA98 | A15.3.03.015 |
| TA2 | 6954 |
| FMA | 60186 |
| Anatomical terminology | |
| This article is one of a series documenting the anatomy of the |
| Human ear |
|---|
Each semicircular canal contains its respective semicircular duct, i.e. the lateral, anterior and posterior semicircular ducts, which provide the sensation of angular acceleration and are part of the membranous labyrinth—therefore filled with endolymph.
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