Bipedalism of man and gibbon compared using estimates of joint motion

Autor: J. H. Prost
Rok vydání: 1967
Předmět:
Zdroj: American Journal of Physical Anthropology. 26:135-148
ISSN: 1096-8644
0002-9483
DOI: 10.1002/ajpa.1330260205
Popis: Motion pictures were taken of a human and gibbon subject performing bipedal locomotion on a flat, level ground surface. The films were analyzed frame-by-frame to estimate the displacements occurring at the pelvic limb joints. The displacements were quantified using a simplification of the Albert-Strasser globographic method. The motion patterns between the human and gibbon were compared to discover similarities and differences in the performances. The gibbon did not run even though it appeared to do so at the time of filming. This suggests that the term “run” might have an ambiguous meaning in behavioral descriptions. Contact periods for both animals varied inversely with speed. Non-contact periods for both animals were relatively invariant to speed. The gibbon's joint motions were less efficient when compared with those of man, particularly the gibbon's abduction of its femur and flexion at its knee during contact periods. The question was raised whether the gibbon could not have improved its performance with training.
Databáze: OpenAIRE
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