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foramen magnum
[ mag-nuhm ]
noun
- the large opening in the base of the skull forming the passage from the cranial cavity to the spinal canal.
foramen magnum
noun
- the large opening at the base of the skull through which the spinal cord passes
Word History and Origins
Origin of foramen magnum1
Word History and Origins
Origin of foramen magnum1
Example Sentences
The foramen magnum, the hole through which the spinal cord exits the head, was positioned directly under the skull, implying the child had an erect posture and walked on two legs.
The foramen magnum, occipital condyles, and exoccipitals show no unusual features.
In a posterior view the foramen magnum and the four bones which surround it and together form the occipital segment are well seen.
The occipital segment consists of four cartilage bones, three of which together surround the foramen magnum.
Just external to the foramen magnum is a small foramen for the exit of the hypoglossal nerve (figs. 44 and 45, XII).
There are often a pair of prominent vacuities in the supra-occipital dorsal to the foramen magnum.
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