| OPLL | ossification of posterior longitudinal ligament |
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| PLL | peripheral light loss; phase-locked loop; poly-L-lysine; pressure length loop; posterior longitudina... |
| ADI | Academy of Dentistry International; acceptable daily intake; AIDS-defining illness; allowable daily ... |
| RFA | resident functional atlas; right femoral artery; right frontoanterior [fetal position] |
| ATF | activating transcription factor; anterior talofibular [ligament]; ascites tumor fluid |
| cruciate anastomosis | Crucial anastomosis, a four-way anastomosis between branches of the first perforating branch of the deep femoral, inferior gluteal and medial and lateral circumflex femoral arteries, located posterior to the upper part of the femur. Formerly described as commonly occurring; investigations show it rarely occurs in the four-way "cross" pattern. (05 Mar 2000) |
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| cruciate eminence | Bony cross-like elevation on the internal aspect of the squamous portion of the occipital bone formed by the intersection of the groove for the transverse sinuses and the internal occipital crest, with the internal occipital protuberance at the centre of the "cross." Synonym: eminentia cruciformis, cruciate eminence. (05 Mar 2000) |
| cruciate ligaments of knee | <radiology> Anterior lateral fem condyle leading to tibial spine, posterior thicker than ACL, tears at tibial insertion, may avulse fragment (12 Dec 1998) |
| cruciate muscle | <anatomy> A general type of muscle in which the muscles or bundles of muscle fibres cross in an X-shaped configuration; e.g., the oblique arytenoid muscles. Synonym: musculus cruciatus. (05 Mar 2000) |
| anterior arch of atlas | 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) |
| anterior tubercle of atlas | A conical protuberance on the anterior surface of the arch of the atlas. Synonym: tuberculum anterius atlantis. (05 Mar 2000) |
| atlas | 1. One who sustains a great burden. 2. <anatomy> The first vertebra of the neck, articulating immediately with the skull, thus sustaining the globe of the head, whence the name. 3. A collection of maps in a volume. Supposed to be so called from a picture of Atlas supporting the world, prefixed to some collections. This name is said to have been first used by Mercator, the celebrated geographer, in the 16th century. 4. <chemistry> Atlas powder, a nitroglycerin blasting compound of pasty consistency and great explosive power. Origin: L. Atlas, -antis, Gr, one of the older family of gods, who bears up the pillars of heaven; also Mt. Atlas, in W. Africa, regarded as the pillar of heaven. It is from the root of to bear. See Tolerate. Source: Websters Dictionary (01 Mar 1998) |
| atlas fracture | <radiology> Incidence: 4% of cervical spine injuries, site: posterior arch, anterior arch, massa lateralis, Jefferson fracture associated with: fractures of C7 (25%), fractures of C2 pedicle (15%), extraspinal fractures (58%) (12 Dec 1998) |
| pit of atlas for dens | 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) |
| posterior arch of atlas | 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) |
| posterior tubercle of atlas | 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) |
| superior articular facet of atlas | 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) |
| superior articular pit of atlas | 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) |
| inferior articular facet of atlas | 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) |
| inferior articular pit of atlas | 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) |