external occipital protuberance

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ex·ter·nal oc·cip·i·tal pro·tu·ber·ance

a prominence about the center of the outer surface of the squamous portion of the occipital bone, giving attachment to the ligamentum nuchae.

external occipital protuberance

a midline projection of the occipital bone with curved lines extending laterally from it.

external occipital protuberance

A bony bump or elevation in the midline of the lower part of the back of the skull in the middle of the occipital bone. It is more prominent in males than in females.
See also: protuberance


a projecting part, or prominence.

external occipital protuberance
on the occipital surface of the occipital bone, above the foramen magnum. The ligamentum nuchae is attached to it.
intercornual protuberance
the prominence between the horns of cows.