The Thoracic Shape of Hominoids
Author
Source
Anatomy Research International
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-04-09
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
In hominoids, the broad thorax has been assumed to contribute to their dorsal scapular position.
However, the dorsoventral diameter of their cranial thorax was found in one study to be longer in hominoids.
There are insufficient data on thoracic shape to explain the relationship between broad thorax and dorsal scapular position.
The current study presents data on multilevel cross-sectional shape and volume distribution in a range of primates.
Biplanar radiographs of intact fluid-preserved cadavers were taken to measure the cross-sectional shape of ten equally spaced levels through the sternum (called decisternal levels) and the relative volume of the nine intervening thoracic segments.
It was found that the cranial thorax of hominoids is larger and broader (except in the first two decisternal levels) than that of other primates.
The cranial thorax of hominoids has a longer dorsoventral diameter because the increase in dorsoventral diameter caused by the increase in the volume of the cranial thorax overcompensates for the decrease caused by the broadening of the cranial thorax.
The larger and broader cranial thorax in hominoids can be explained as a locomotor adaptation for scapular gliding and as a respiratory adaptation for reducing the effects of orthograde posture on ventilation-perfusion inequality.
American Psychological Association (APA)
Chan, Lap Ki. 2014. The Thoracic Shape of Hominoids. Anatomy Research International،Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-463585
Modern Language Association (MLA)
Chan, Lap Ki. The Thoracic Shape of Hominoids. Anatomy Research International No. 2014 (2014), pp.1-8.
https://search.emarefa.net/detail/BIM-463585
American Medical Association (AMA)
Chan, Lap Ki. The Thoracic Shape of Hominoids. Anatomy Research International. 2014. Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-463585
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-463585