Dictionary of Human Evolution and Biology

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Occipital-marginal Venous System

One of several pathways for venous return of blood from the brain in which blood from the sagittal sinus flows into the occipital venous sinus and from there into the marginal venous sinus in the vicinity of the foramen magnum. An enlarged state is characteristic of Australopithecus afarensis and Paranthropus. Modified as the transverse sinus in AMHs. Aka the marginal and the occipital venous system.

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