atlanto-occipital


Also found in: Acronyms.

atlanto-occipital

, atlantooccipital (ăt-lan″tō-ok-sip′tĭ-ăl) [ atlanto- + occipital]
Pert. to the atlas and the occipital bones.

atlanto-occipital

pertaining to the atlas and occiput, e.g. atlanto-occipital joint.

atlanto-occipital fusion
a congenital defect observed in calves; causes tetraplegia at birth or by two months of age.
atlanto-occipital malformation
includes hypoplasia of the odontoid process, atlanto-occipital fusion.
atlanto-occipital malformation of Arab horses
includes occipitalization of the atlas and atlantalization of the axis. It causes incoordination with a characterisitic extension of the head at birth or soon afterwards.
atlanto-occipital membrane
there are two, the dorsal and ventral, each of which connects the cranial edge of the atlas to the margin of the foramen magnum.
References in periodicals archive ?
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.
Atlanto-occipital 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.
Atlanto-occipital 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 joint.