Brain expansion and rotation during hominid evolution |
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| Authors: | D Falk C Hildebolt M W Vannier |
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| Institution: | (1) Department of Anthropology, State University of New York at Albany, 12222 Albany, New York, USA;(2) Mallinckrodt Institute of Radiology, Washington University School of Medicine, 63110 St. Louis, MO, USA |
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| Abstract: | The question of how an endocast (or brain) is oriented within a skull that is positioned in the Frankfurt plane is investigated
for African great apes, early hominids STS 71, KNM-ER 1813 and KNM-ER 1470, and modern humans using a 3SPACE digitizer. Our
results suggest that, rather than being positioned in the orientation in which isolated brains (endocasts) are conventionally
illustrated, brains within skulls that are oriented in the Frankfurt plane tend to be inclined so that the frontal pole is
higher than the occipital pole, especially inHomo. These preliminary findings have implications for interpreting early hominid endocasts such as that of AL 162-28. |
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| Keywords: | Australopithecine brain evolution cerebellum endocast Frankfurt Horizontal |
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