Superior semicircular canal
|Superior semicircular canal|
|Interior of right osseous labyrinth.|
|Latin||Canalis semicircularis anterior,
canalis semicircularis superior
|Gray's||subject #232 1049|
The superior semicircular canal (anterior semicircular canal) is a part of the vestibular system and detects rotation of the head around a rostral-caudal (anterior-posterior) axis.
It is 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. As part of the vestibular system it detects rotation of the head around a rostral-caudal (anterior-posterior) axis.
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.
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