EXS 331 Lab: occipital bone and landmarks

occipital bone

back of head

occipital condyles

Rounded projections lateral to the foramen magnum that articulate with the first cervical vertebra (atlas)

external occipital protuberance (inion)

bump on back of head

internal occipital protuberance

internal landmark of the occipital bone

superior nuchal line

Ridge that runs horizontally from the external occipital protuberance

hypoglossal canal

foramen magnum

the hole in the base of the skull through which the spinal cord passes.

sulcus for transverse sinus

a wide, horizontal groove on the internal surface of the occipital bone

sulcus for sigmoid sinus

houses sigmoid sinus

sulcus for superior sagittal sinus

a long, shallow groove on the internal surface of the skull bones that runs along the midline