the large opening at the base of the skull that the spinal cord and left and right vertebral arteries and other tissues pass between the neck and the interior of the skull.

FORAMEN MAGNUM: "The foramen magnum is at the base of the skull."
Cite this page: N., Pam M.S., "FORAMEN MAGNUM," in, May 11, 2013, (accessed October 15, 2021).