Article1956

AGE CHANGES IN THE POSITION OF THE FORAMEN MAGNUM IN HOMINOIDS

32 citations0/0 files storedProceedings of the Zoological Society of London

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Forensic Anthropology and Bioarchaeology Studies Pleistocene-Era Hominins and Archaeology Morphological variations and asymmetry

Abstract

SUMMARY The position of the foramen magnum has been described by means of indices which relate the lengths of the segments into which perpendiculars drawn from the endobasion divide the maximum antero‐posterior dimensions of the skull and brain‐case. The values of these indices have been computed and compared in various age and sex sub‐groups of apes and men. At all stages of development the foramen magnum is situated relatively more anteriorly in men than in apes. The foramen magnum is always situated relatively more anteriorly in immature than in mature apes and men. The amount of change in its position during growth is less in man than in the living African apes. The position of the foramen magnum in the Australopithecinae and the extent to which it alters with age correspond more to the pattern seen in the extant great apes than in living man.

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References

1925Australopithecus africanus The Man-Ape of South Africa 1938The Pleistocene Anthropoid Apes of South Africa 1946The South African Fossil Ape-Men: The Australopithecinae 1952Swartkrans ape-man, Paranthropus crassidens 1949Sterkfontein ape-man Plesianthropus 1947The South African Fossil Ape‐Men: The Australopithecinae 1962The Physical Distinctions of Man 1955Age changes in the basicranial axis of the human skull

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2019Expanded character sampling underscores phylogenetic stability of Ardipithecus ramidus as a basal hominin 1999The scaling of basicranial flexion and length 1990Position and orientation of the foramen magnum in higher primates 2004Foramen magnum position variation inPan troglodytes, Plio-Pleistocene hominids, and recentHomo sapiens: Implications for recognizing the earliest hominids 1993Continuity and discontinuity during hominization 1979Relationship of Australopithecus and Homo: Another view

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