Morphometry of the outlet of the foramen magnum in crania with atlantooccipital fusion

Laboratory investigation

R. Shane Tubbs, Jeffrey R. Lancaster, Martin M. Mortazavi, Mohammadali M. Shoja, Joshua J. Chern, Marios Loukas, Aaron Cohen-Gadol

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Object. Assimilation of the atlas to the occiput may result in symptoms that are often compressive in nature around the outlet of the foramen magnum. The aim of the present study was to elucidate the morphological features of the bone through this foramen. Methods. Thirteen adult skulls with atlantooccipital fusion underwent morphometrical analysis of the outlet of the foramen magnum. Results. All specimens but one were found to have a decreased area of the outlet of the foramen magnum. In those 12 specimens, a decrease of 15%-35% was seen. Fusions of the atlas that were based primarily along the anterior rim of the foramen magnum resulted in more obstruction of its outlet. In general, the horizontal diameters of the outlet of these foramina were more decreased from the normal range. Conclusions. These findings demonstrate that in the majority of cases, assimilation of the atlas to the occiput results in a compromised outlet of the foramen magnum.

Original languageEnglish
Pages (from-to)55-59
Number of pages5
JournalJournal of Neurosurgery: Spine
Volume15
Issue number1
DOIs
StatePublished - Jul 2011

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Foramen Magnum
Skull
Atlases
Reference Values
Bone and Bones

Keywords

  • Anatomy
  • Foramen magnum
  • Neurosurgery
  • Skull base

ASJC Scopus subject areas

  • Clinical Neurology
  • Surgery
  • Neurology

Cite this

Morphometry of the outlet of the foramen magnum in crania with atlantooccipital fusion : Laboratory investigation. / Tubbs, R. Shane; Lancaster, Jeffrey R.; Mortazavi, Martin M.; Shoja, Mohammadali M.; Chern, Joshua J.; Loukas, Marios; Cohen-Gadol, Aaron.

In: Journal of Neurosurgery: Spine, Vol. 15, No. 1, 07.2011, p. 55-59.

Research output: Contribution to journalArticle

Tubbs, R. Shane ; Lancaster, Jeffrey R. ; Mortazavi, Martin M. ; Shoja, Mohammadali M. ; Chern, Joshua J. ; Loukas, Marios ; Cohen-Gadol, Aaron. / Morphometry of the outlet of the foramen magnum in crania with atlantooccipital fusion : Laboratory investigation. In: Journal of Neurosurgery: Spine. 2011 ; Vol. 15, No. 1. pp. 55-59.
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