Table of Contents
ISRN Anatomy
Volume 2013 (2013), Article ID 403937, 4 pages
Research Article

Study of the Location and Morphology of the Pterion in Adult Nigerian Skulls

Department of Anatomy, University of Ibadan, Ibadan, Nigeria

Received 28 March 2013; Accepted 28 May 2013

Academic Editors: A. Al-Hayani, A. Capehart, and B. Mitchell

Copyright © 2013 Sunday A. Adejuwon et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The pterion which marks the union of 4 bones of the cranium is located superior to the zygomatic arch and posterior to the frontozygomatic suture. It is an important neurosurgical landmark for the lateral/pterional approach and has racial differences in both its location and pattern of union of the bones. This study aims to analyze the location and types of pterion in adult Nigerian skulls. Bilateral sides of 37 adult dry skulls were studied. The pterion types were classified; linear distances from the centre of the pterion to the midpoint of the zygomatic arch and to the frontozygomatic suture were measured; these were analyzed for side and gender differences. Sphenoparietal was the most common pterion type (86.1%) followed by frontotemporal (8.3%), stellate (5.6%), and epipteric types (0%). The mean distances from the pterion to the midpoint of zygomatic arch were  mm and  mm in males and females, respectively, while the distances to the frontozygomatic suture were  mm and  mm. The vertical position of the pterion was significantly higher in males than females. Bilateral occurrence is statistically insignificant. This information will be of neurosurgical and anthropological importance.