| Bone: Internal occipital crest | |
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| Occipital bone. Inner surface. (Internal occipital crest not labeled, but occipital sinus is visible at center.) | |
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| Base of the skull. Upper surface. (Internal occipital crest not labeled, but visible below foramen magnum.) | |
| Latin | crista occipitalis interna |
| Gray's | subject #31 131 |
In the occipital bone, the lower division of the cruciate eminence is prominent, and is named the internal occipital crest; it bifurcates near the foramen magnum and gives attachment to the falx cerebelli; in the attached margin of this falx is the occipital sinus, which is sometimes duplicated.
In the upper part of the internal occipital crest, a small depression is sometimes distinguishable; it is termed the vermian fossa since it is occupied by part of the vermis of the cerebellum.
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