منابع مشابه
News and Views Knuckle-walking hominid ancestors
Richmond & Strait (2000) have attracted much attention with a recent morphometric analysis of distal radii of anthropoids and hominid fossils, suggesting some of the latter share knuckle-walking traits. Several aspects of their treatment deserve comment. These authors show A.L. 288-1q,v and the putative hominid fossil KNM-ER 20419 falling near chimpanzees and gorillas in a canonical analysis of...
متن کاملKnuckle walking by a baboon (Papio cynocephalus).
This paper describes the development of a knuckle walking mode of locomotion by a free-living yellow baboon (Papio cynocephalus). Some implications of this occurrence for theories of the evolution of knuckle walking are discussed.
متن کاملOrigin of human bipedalism: The knuckle-walking hypothesis revisited.
Some of the most long-standing questions in paleoanthropology concern how and why human bipedalism evolved. Over the last century, many hypotheses have been offered on the mode of locomotion from which bipedalism originated. Candidate ancestral adaptations include monkey-like arboreal or terrestrial quadrupedalism, gibbon- or orangutan-like (or other forms of) climbing and suspension, and knuck...
متن کاملKnuckle pads.
Knuckle pads are well circumscribed thickenings of the skin over the metacarpophalangeal and, more commonly, the proximal interphalangeal joints. Although the association with several other clinical syndromes including Dupuytren's disease is well documented, most cases are idiopathic. We present a case of knuckle pads and briefly review the history and course of this disease.
متن کاملKnuckle-Walking Signal in the Manual Phalanges and Metacarpals of the Great Apes (Pan and Gorilla)
To understand the role of knuckle walking in hominin evolution, we need to better understand behavioral variation in knuckle walking, and specifically whether behavioral similarities between chimpanzees and gorillas are likely homologous. Differences in how the hands of gorillas and chimpanzees contact the ground while knuckle walking have been noted but not quantified: it is widely believed th...
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ژورنال
عنوان ژورنال: Nature
سال: 1972
ISSN: 0028-0836,1476-4687
DOI: 10.1038/237414c0