Mastoid foramen

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Mastoid foramen
Gray138.png
Left temporal bone. Inner surface. (Mastoid foramen labeled at bottom left.)
Gray193.png
Base of the skull. Upper surface. (Temporal bone is pink, and label for mastoid foramen is at left, second from the bottom.)
Latin foramen mastoideum
Gray's p.141
Anatomical terms of bone

The mastoid foramen is a large hole in the posterior border of the temporal bone. It transmits a Mastoid emissary vein to the sigmoid sinus and a small branch of the occipital artery, the posterior meningeal artery to the dura mater.

Variations[edit]

The position and size of this foramen are very variable; it is not always present; sometimes it is situated in the occipital bone, or in the suture between the temporal and the occipital.

It transmits (1) an emissary vein connecting the sigmoid sinus with the posterior auricular vein and (2) a meningeal branch of the occipital artery

Additional images[edit]

External links[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.