Superior semicircular canal

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Superior semicircular canal
Interior of right osseous labyrinth.
Latin	canalis semicircularis anterior, canalis semicircularis superior
Gray's	subject #232 1049
System
MeSH	A09.246.631.663
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The superior semicircular canal (anterior semicircular canal), 15 to 20 mm. in length, is vertical in direction, and is placed transversely to the long axis of the petrous portion of the temporal bone, on the anterior surface of which its arch forms a round projection.

It describes about two-thirds of a circle.

Its lateral extremity is ampullated, and opens into the upper part of the vestibule; the opposite end joins with the upper part of the posterior canal to form the crus commune, which opens into the upper and medial part of the vestibule.

See also

• Semicircular canal

Additional images

Transverse section through head of fetal sheep, in the region of the labyrinth. X 30.

Position of the right bony labyrinth of the ear in the skull, viewed from above.

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

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