Atlantal


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At`lan´tal


a.1.(Anat.) Relating to the atlas.
References in periodicals archive ?
The posterior arch of the atlas forms about 3/5th of the atlantal ring.
From ventral to dorsal these are the alar ligament (oblique fibers connect the dens to occipital condyles), cruciate ligament (connects posterior dens to anterior atlas arch, with strong horizontal transverse atlantal ligament, and vertical fibers connecting the posterior atlas to the foramen magnum), and tectorial membrane (cranial extension of the posterior longitudinal ligament connecting posterior C2 to the anterior foramen magnum).
Ligaments stabilizing the atlantoaxial junction (C1-C2 joint), which are shown in Figure 1, include the tectorial membrane, the cranial extension of the posterior longitudinal ligament that limits axial distraction; the alar ligaments, which transfix the dens to the occipital condyles to restrain rotational motion; and the transverse atlantal ligament (TAL), which restricts the dens from impacting the cord in flexion.
The pedicle screw on atlas was placed at the intersection point, and it was about 20 mm beside the midpoint of atlantal posterior tubercle and 1-2mm superior to the inferior edge of posterior arch.
It extends from the atlantal fossa to the basihyoid bone so that it is partly covered by the parotid gland (ELLENPORT, 1986; DYCE et al.
Calyptocephalellidae diagnosable on the basis of the following combination of characters (autapomorphies marked by asterisk): 1) relatively well-developed pterygoid process of the maxilla, 2) unsculptured alveolar region of the labial face of the maxilla dorsoventrally narrow *, 3) premaxilla with anterior portion of palatine shelf well defined in lingual view, 4) atlantal cotyles bean-shaped *, 5) unfused atlas and second presacral vertebra, 6) strong anteroposterior extension of sacral vertebral diapophyses *.
To perform this procedure successfully, the transverse atlantal ligament must be intact, and the fracture must be adequately reduced; reduction is verified by using fluoroscopy in the operating room.
The first part involves insonation of the vessel at the sub-occipital level where the artery runs along the atlantal transverse process.
The MRI study is of paramount importance, since it delineates the condition of the atlantal transverse ligament.
Twenty heads, severed at the occipito atlantal joint were obtained from freshly slaughtered WAD sheep.
ADELEIDAE (web2), ATLANTAL, BIAJAIBA (pul), CATARACT, CIATICA, CYATYCA, DIAPSIDA, DIETHYLTOLUAMIDE (sted), DISCOIDS, DYSCOMFYDS, ENDEIGNED, ENSHRINES, FATHERCRAFT (web2), FIELD-WIFE, GAS-BAGS, GREEN-CHARGE, INCUDO-TYMPANIC, INSIGNIS, INTERKNIT, MASTOGRAMS (dor), MESEEMS, MISAIMS, MUSEUMS, NASORAEANS (cham), NATURANT, NIGGLING, NUSAUNS, PIEWIPE, PISTOL-WHIPS, PUSH-UPS, RAIYATWARI (cham), RESCUERS, RETROVERT, ROMANIFORM (web2), RUSH-HOURS, SETTEST, SIMPLISM, SITARIST, STANITSA, TAENIATE, TIEMANNITE, TOSSPOTS, TRIMURTI, WOLF-GROWL