Face articulaire inférieure - Facies articularis inferior



The inferior articular surfaces (inferior articular facets) are circular in form, flattened or slightly convex and directed downward and medialward, articulating with the axis, and permitting the rotatory movements of the head. Just below the medial margin of each superior facet is a small tubercle, for the attachment of the transverse atlantal ligament which stretches across the ring of the atlas and divides the vertebral foramen into two unequal parts—the anterior or smaller receiving the odontoid process of the axis, the posterior transmitting the medulla spinalis and its membranes. This part of the vertebral canal is of considerable size, much greater than is required for the accommodation of the medulla spinalis, and hence lateral displacement of the atlas may occur without compression of this structure.

Cette définition contient du texte provenant d'une édition publique de Gray's Anatomy (20eme édition Américaine de "Gray's Anatomy of the Human Body" publiée en 1918 - http://www.bartleby.com/107/).

Hiérarchie anatomique

Anatomie générale > Os; Système squelettique > Squelette axial > Colonne vertébrale > Vertèbres cervicales [C I-C VII] > Atlas [C I] > Masse latérale de l'atlas > Face articulaire inférieure