Morphometry and Variations of Bony Ponticles of the Atlas Vertebrae (C1) in Kenyans
View/ Open
Date
2010Author
Bundi, P Karau
Ogeng'o, Julius A
Hassanali, J
Odula, PO
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
Atlas bridges, the bony outgrowths over the third segment of the vertebral artery are associated with compression
of the artery and nerves. There are limited studies comparing morphometry of the complete atlas bridges and that of the ipsilateral
transverse foramen. Bilateral and gender differences in the morphometry of the complete bridges remain relatively unexplored. One
hundred and two atlas vertebrae (49 male and 53 female) obtained from the Osteology Department of the National Museums of Kenya
were used for this study. The presence of complete posterior atlas bridge (retroarticular canal) and lateral bridge (supratransverse foramen)
was noted. Measurements were taken for the diameters of foramina, and the ipsilateral transverse foramina and their areas calculated.
Complete posterior bridges occurred in 14.6% and 13.6% on the right and left sides respectively. The lateral bridge was found in 3.9% of
the cases on the right side only. The complete posterior bridges had a cross-sectional area of 23.44mm2 on the right and 24.98mm2 on the
left side. The lateral bridges had a mean cross-sectional area of 27.30mm2. The right and left transverse foramina had mean crosssectional
area of 36.30mm2 and 37.20mm2 respectively, which was significantly larger than that of the ipsilateral complete and posterior
bridges. The smaller dimensions of the complete atlas bridges compared to the ipsilateral transverse foramen suggest that they may
predispose to vertebrobasilar insufficiency, Barre-Lieou and cervicogenic syndromes due to compression of the contents in the foramina.
URI
http://www.scielo.cl/pdf/ijmorphol/v28n4/art06.pdfhttp://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/15275
Citation
Int. J. Morphol.,Publisher
Human Anatomy
Collections
- Faculty of Health Sciences (FHS) [10377]