Magnetic resonance imaging of the extradural space of the thoracic spine

British Journal of Anaesthesia
Y HirabayashiN Seo

Abstract

To clarify the anatomy of the extradural space of the thoracic spine, we have compared magnetic resonance (MR) images of the thoracic spine with those of the lumbar spine. In 20 healthy volunteers, T2-weighted axial MR images were obtained at the levels of the C7-T1, T7-8, T11-12 and L2-3 vertebrae. The posterior extradural space seen in the slice through the intervertebral disc varied in shape and size depending on the vertebral level, and the shape of the space converted from triangular to crescent-shaped on moving from the lumbar to the thoracic spine. In particular, the posterior extradural space was almost absent at the C7-T1 level, indicating that the posterior extradural fat was rudimentary or non-existent at the thoracocervical level. At this level, the dura mater seemed to be in direct contact with the ligamentum flavum. Segmentation of the posterior extradural space was commonly observed at the L2-3 and T11-12 levels; however, incomplete segmentation of the posterior extradural space was often present at the T7-8 level.

Citations

Aug 29, 2003·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Hélène BeloeilDan Benhamou
Apr 14, 2007·Der Anaesthesist·F Gerheuser, A Roth
Feb 2, 2011·Annales Françaises D'anesthèsie Et De Rèanimation·F FischerA Steib
May 4, 2010·Acta Anaesthesiologica Taiwanica : Official Journal of the Taiwan Society of Anesthesiologists·Pi-Ying ChangMei-Yung Tsou
Mar 22, 2007·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·M HamidO Plaisant
Aug 12, 2015·Regional Anesthesia and Pain Medicine·Joseph M NealJames P Rathmell
Sep 30, 2020·The Journal of Physiology·Robert A LloydLynne E Bilston

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