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Titolo:
EARLY-MODERN HUMAN REMAINS FROM EASTERN ASIA - THE YAMASHITA-CHO-1 IMMATURE POSTCRANIA
Autore:
TRINKAUS E; RUFF CB;
Indirizzi:
UNIV NEW MEXICO,DEPT ANTHROPOL ALBUQUERQUE NM 87131 UNIV BORDEAUX 1,LAB ANTHROPOL,URA 376 CNRS F-33405 TALENCE FRANCE JOHNS HOPKINS UNIV,SCH MED,DEPT CELL BIOL & ANAT BALTIMORE MD 21205
Titolo Testata:
Journal of Human Evolution
fascicolo: 4, volume: 30, anno: 1996,
pagine: 299 - 314
SICI:
0047-2484(1996)30:4<299:EHRFEA>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
CROSS-SECTIONAL GEOMETRY;
Keywords:
HUMAN PALEONTOLOGY; EARLY MODERN HUMANS; POSTCRANIA; FEMUR; TIBIA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
E. Trinkaus e C.B. Ruff, "EARLY-MODERN HUMAN REMAINS FROM EASTERN ASIA - THE YAMASHITA-CHO-1 IMMATURE POSTCRANIA", Journal of Human Evolution, 30(4), 1996, pp. 299-314

Abstract

One of the oldest, well-dated, early modern human specimens from eastern Asia is the Okinawan Yamashita-cho 1 juvenile (ca. 6 year old) femur and tibia, C-14 dated to >32,000 BP. The diaphyses of the specimen are compared with recent human and archaic Homo juveniles using cross-sectional geometric parameters (areas and second moments of area obtained through external molding and multiple plane radiography) to assessaxial and bending strengths. Despite an incipient femoral pilaster (nor seen in archaic Homo but predominant among early modern humans), the Yamashita-cho 1 femoral and tibial midshafts fall close to the archaic humans and at the limits of recent human variation in terms of diaphyseal cross-sectional shape [I-x/I-y, I-max/I-min, % cortical area (CA)] and robusticity [CA-STD and polar second moment of area (J)-STD]. In contrast, the Yamashita-cho 1 femoral neck-shaft angle of 136 degrees and its predicted adult value of ca. 132 degrees place it well above those of archaic Homo, and close to the values for African, Near Eastern and more recent eastern Asian early modern humans. In this respect, Yamashira-cho 1 is aligned with early modern humans. These data provide a mosaic pattern, in which diaphyseal robusticity and the cross-sectional distribution of bone parallel those seen in archaic Homo, whereas the presence of an incipient pilaster and the high neck-shaft angle align the specimen with early modern humans. Given that most of these features are developmentally plastic, these imply a changing ontogenetic pattern of lower-limb loading regimes in eastern Asia associatedwith the emergence of modern humans. (C) 1996 Academic Press Limited

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Documento generato il 27/11/20 alle ore 04:18:53