Document Detail

High-resolution computed tomography study of the cranium of a fossil anthropoid primate, Parapithecus grangeri: new insights into the evolutionary history of primate sensory systems.
MedLine Citation:
PMID:  15470668     Owner:  NLM     Status:  MEDLINE    
Extant anthropoids have large brains, small olfactory bulbs, and high-acuity vision compared with other primates. The relative timing of the evolution of these characteristics may have important implications for brain evolution. Here computed tomography is used to examine the cranium of a fossil anthropoid, Parapithecus grangeri. It is found that P. grangeri had a relatively small brain compared with living primates. In addition, it had an olfactory bulb in the middle of the range for living primates. Methods for relating optic foramen area and other cranial measurements to acuity are discussed. Multiple regression is used to estimate retinal ganglion cell number in P. grangeri. Given currently available comparative data, P. grangeri seems to have had retinal ganglion cell counts intermediate for living primates, overlapping with the upper end of the range for strepsirrhines and possibly with the lower end for anthropoids.
Eliot C Bush; Elwyn L Simons; John M Allman
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The anatomical record. Part A, Discoveries in molecular, cellular, and evolutionary biology     Volume:  281     ISSN:  1552-4884     ISO Abbreviation:  -     Publication Date:  2004 Nov 
Date Detail:
Created Date:  2004-10-27     Completed Date:  2005-03-31     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  101234285     Medline TA:  Anat Rec A Discov Mol Cell Evol Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1083-7     Citation Subset:  IM    
Copyright Information:
(c) 2004 Wiley-Liss, Inc.
Biology Division, California Institute of Technology, Pasadena, California, USA.
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MeSH Terms
Brain / anatomy & histology*,  physiology
Cell Count
Haplorhini / anatomy & histology*,  physiology
Image Processing, Computer-Assisted
Olfactory Bulb / anatomy & histology,  physiology
Olfactory Pathways / anatomy & histology*,  physiology
Optic Nerve / anatomy & histology,  physiology
Retinal Ganglion Cells / cytology,  physiology
Skull / anatomy & histology*,  physiology,  radiography
Smell / physiology
Tomography, X-Ray Computed
Vision, Ocular / physiology
Visual Acuity / physiology
Visual Pathways / anatomy & histology*,  physiology
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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