Occipital bone. Inner surface. (Internal occipital crest not labeled, but occipital sinus is visible at center.)
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| colspan="2" |Base of the skull. Upper surface. (Internal occipital crest not labeled, but visible below foramen magnum.)
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|Latin
|colspan="2"|crista occipitalis interna
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|[[List of subjects in Gray's Anatomy:31#Gray.27s_page_.23|Gray's]]
|colspan="2"|[subject #31 ]
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|System
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|Precursor
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|MeSH
|colspan="2"|[]
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|Dorlands/Elsevier
|colspan="2"|[c_62/12266790]
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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.
