Skull Base Anatomy Self Test

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 Answer to Question 1:

The bone(s) forming the margins of the foramen magnum are:

a. Occipital
b. Occipital and mastoid portion of the temporal bone
c. Occipital and petrous portion of the temporal bone
d. Occipital and sphenoid (posterior portion of body)
e. Occipital, petrous portion of the temporal bone, and sphenoid (posterior portion of body)

Only the occipital bone forms the margins of the foramen magnum.

In this image, the hypoglossal canals are shown opening into the jugular foramina.