NDLI: Cross-Sectional Morphology of the Femoral Neck of Wild Chimpanzees

Content Provider	Springer Nature Link
Author	Matsumura, Akiyoshi Gunji, Harumoto Takahashi, Yutaka Nishida, Toshisada Okada, Morihiko
Copyright Year	2010
Abstract	To understand the mechanical effects of different modes of locomotion on the femoral neck of chimpanzees, we investigated the cross-sectional morphology of the femoral neck of 4 chimpanzees (Pan troglodytes schweinfurthii) collected from the Mahale Mountains, Tanzania. We performed serial computed tomography (CT) scans of the neck from the femoral head to the base of the neck perpendicular to the long axis of the neck. We measured the cortical thickness of the serial 5 cross sections of the neck region every 45° around the circumference, i.e., 8 points per section, and examined the cross-sectional properties of the mid-section. When we compared the superior and inferior parts of the cortical thickness of the femoral neck, the inferior part exhibited the greatest cortical thickness whereas the superior part had the smallest values in every specimen. Researchers have also observed such regional differences between superior and inferior cortical thicknesses in bipedal humans and other primates, although these differences are not as large in the chimpanzee as in bipedal hominini. The present study differed from the past study on hominini and chimpanzees in that the superior anterior (SA) part exhibited greater cortical thickness in chimpanzees. We believe these observations reflect the structural strengthening of parts of the chimpanzee femoral neck that is needed to accommodate the mechanical loads imposed by arboreal vertical climbing and terrestrial quadrupedal and bipedal locomotion.
Starting Page	219
Ending Page	238
Page Count	20
File Format	PDF
ISSN	01640291
Journal	International Journal of Primatology
Volume Number	31
Issue Number	2
e-ISSN	15738604
Language	English
Publisher	Springer US
Publisher Date	2010-04-23
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	bipedal walking cortical thickness early hominids humans Pan troglodytes schweinfurthii Animal Genetics and Genomics Zoology Anthropology Human Genetics Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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