Atlantooccipital dislocation-part 2: The clinical use of (occipital) condyle-C1 interval, comparison with other diagnostic methods, and the manifestation, management, and outcome of atlanto-occipital
dislocation in children.
fusion represents partial or complete fusion of the bony ring of the atlas to the occiput and is, as well, a contraindication to contact sports.
In mammals, the caudal lumbar and atlanto-occipital
regions are commonly used as injection sites.
Current methods of slaughter used by the industry in general are: insertion of blade to sever the spinal cord and blood vessels at the atlanto-occipital area (sometimes termed "nape-stab"); clubbing with hammers; bludgeoning with axes; shooting through cranium from a superior aspect with free-projectile firearms; shooting into atlanto-occipital area from a posterior-diagonal aspect with free-projectile firearms.
Using one hand, the second person positions the 46-centimeter-long chisel midway in the atlanto-occipital region, so as to be in line with the cervical vertebrae and thus the spinal cord.
dislocation can be obvious on plain film or CT, but dissociation can be more difficult to identify (Figure 2).
An abnormal atlanto-occipital
junction increases the risk of spinal cord injury during laryngoscopy, intubation and patient positioning (1).
Our patient indeed had atlanto-occipital
instability secondary to a locally destructive tumor of the cranial base, known as a clival chordoma.
It is known that the atlanto-occipital
plane and therefore the socle joint (C2 vertebral body) are especially vulnerable to indirect trauma.
Airway examination revealed a Mallampati class IV; mouth opening <2 finger breadths; significant dental overbite; thyromental distance <2 finger breadths; and no extension at the atlanto-occipital