| arcus anterior atlantis | An arch that connects the lateral masses of the atlas anteriorly and articulates with the anterior articular facet of the dens of the axis. Synonym: arcus anterior atlantis. (05 Mar 2000) |
|---|---|
| arcus posterior atlantis | The posterior arch of the atlas that connects the lateral masses of the atlas posteriorly, forming the posterior wall of the vertebral canal at this level. Synonym: arcus posterior atlantis. (05 Mar 2000) |
| massa lateralis atlantis | The thick lateral part of the atlas on each side that articulates above with the occipital condyle and below with the axis. Synonym: massa lateralis atlantis. (05 Mar 2000) |
| tuberculum anterius atlantis | A conical protuberance on the anterior surface of the arch of the atlas. Synonym: tuberculum anterius atlantis. (05 Mar 2000) |
| tuberculum posterius atlantis | A protuberance of the posterior extremity of the arch of the atlas, a rudiment of the spinous process giving attachment to the musculus rectus capitis posterior minor muscle. Synonym: tuberculum posterius atlantis. (05 Mar 2000) |
| facies articularis inferior atlantis | One of two concave surfaces on the lateral masses of the atlas that articulate with corresponding surfaces on the axis. Synonym: facies articularis inferior atlantis, fovea articularis inferior atlantis, inferior articular pit of atlas. (05 Mar 2000) |
| facies articularis superior atlantis | One of two concave articular surfaces on the superior aspect of the lateral masses of the atlas that articulate with the occipital condyles. Synonym: facies articularis superior atlantis, fovea articularis superior atlantis, superior articular pit of atlas. (05 Mar 2000) |
| fovea articularis inferior atlantis | One of two concave surfaces on the lateral masses of the atlas that articulate with corresponding surfaces on the axis. Synonym: facies articularis inferior atlantis, fovea articularis inferior atlantis, inferior articular pit of atlas. (05 Mar 2000) |
| fovea articularis superior atlantis | One of two concave articular surfaces on the superior aspect of the lateral masses of the atlas that articulate with the occipital condyles. Synonym: facies articularis superior atlantis, fovea articularis superior atlantis, superior articular pit of atlas. (05 Mar 2000) |
| fovea dentis atlantis | A circular facet on the posterior (inner) surface of the anterior arch of the atlas which articulates with the dens of the axis. Synonym: fovea dentis atlantis, pit of atlas for dens. (05 Mar 2000) |
| ligamentum cruciatum atlantis | The strong ligament that lies posterior to the dens of the axis holding it against the anterior arch of the atlas; it consists primarily of the transverse ligament of the atlas that forms the cross-bar of the cross and is most important functionally, and longitudinal bands of the cruciform ligament, forming the upright or vertical beams of the cross. Synonym: ligamentum cruciforme atlantis, crucial ligament, cruciate ligament of the atlas, ligamentum cruciatum atlantis. (05 Mar 2000) |
| ligamentum cruciforme atlantis | The strong ligament that lies posterior to the dens of the axis holding it against the anterior arch of the atlas; it consists primarily of the transverse ligament of the atlas that forms the cross-bar of the cross and is most important functionally, and longitudinal bands of the cruciform ligament, forming the upright or vertical beams of the cross. Synonym: ligamentum cruciforme atlantis, crucial ligament, cruciate ligament of the atlas, ligamentum cruciatum atlantis. (05 Mar 2000) |
| ligamentum transversum atlantis | Thick, strong, centrally flattened band spanning the vertebral foramen of the atlas as it extends from the medial aspect of one lateral mass to the other, passing dorsal to the dens with which it articulates; it forms the dorsal portion of the opening for the dens, tightly embracing its neck. It forms a part of the "cross-bar" of the cruciform ligament of the atlas. See: cruciform ligament of atlas. Synonym: ligamentum transversum atlantis, Lauth's ligament, transverse atlantal ligament. (05 Mar 2000) |
| rubroreticular fasciculi | Bundles of fibres that connect the red nucleus to the pontine and midbrain reticular nuclei. Synonym: fasciculi rubroreticulares. (05 Mar 2000) |
| crus dextrum fasciculi atrioventricularis | The right leg or branch of the atrioventricular bundle which diverges from the left crus just below the membranous portion of the interventricular septum to descend the septal wall of the right ventricle and ramify beneath the endocardium. Synonym: crus dextrum fasciculi atrioventricularis. (05 Mar 2000) |