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The O.H. 7 (Olduvai Gorge, Tanzania) hominid partial brain endocast revisited
Author(s) -
Holloway Ralph L.
Publication year - 1980
Publication title -
american journal of physical anthropology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.146
H-Index - 119
eISSN - 1096-8644
pISSN - 0002-9483
DOI - 10.1002/ajpa.1330530211
Subject(s) - endocast , olduvai gorge , brain size , anatomy , biology , paleontology , skull , medicine , radiology , magnetic resonance imaging
The O.H.7 brain endocast was reexamined using a stereoplotting apparatus to quantify the amount of distortion. Some 127 measurements for each of the left and right sides were taken and treated statistically by student t‐tests, both in paired and grouped fashion. Grouped data indicated no significant left‐right differences. Paired data suggested three small regions of distortion, which produced three pairs of left‐right differences that were significantly different. Given the very local nature of these minor distortions, it is concluded that the original reconstruction by Tobias was essentially correct. In addition, multiple regression analyses of selected chord‐arc dimensions suggest that a volume in excess of 700 ml is most probable.