Which of These Bones Has a Foramen That Encircles the Superior

Question

Which of these bones has a foramen that encircles the superior aspect of the spinal cord?
A) mandible
B) sphenoid
C) occipital
D) temporal
E) ethmoid

Accepted Answer

The occipital bone has a large opening called the foramen magnum, which encircles the superior aspect of the spinal cord as it exits the skull. The other bones listed do not have foramina that encircle the spinal cord in this way.