basion /ba·si·on/ (ba´se-on) the midpoint of the anterior border of the foramen magnum.
basion
basion (bā´sēon),
ba·si·on (b  s - n , -z-)n. The middle point on the anterior margin of the great foramen opposite the opisthion. |
basion
[bā′sē·on]
Etymology: Gk, basis, foundation
the midpoint on the anterior margin of the foramen magnum of the occipital bone.
basion (bā´sēon),
n the midline point at the anterior margin of the occipital foramen.
basion
the midpoint of the anterior (ventral) border of the foramen magnum.
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