atlanto-occipital membrane

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an·te·ri·or at·lan·to·oc·cip·i·tal mem·brane

the fibrous layer that extends from the anterior arch of the atlas to the anterior margin of the foramen magnum of the occipital bone.

atlanto-occipital membrane

A single midline ligamentous structure that extends from the arch of the atlas to the borders of the foramen magnum.
See also: membrane


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.