Atlanto-Occipital Joint Flashcards
Atlanto-Occipital Joint classification
A synovial, ellipsoid joint. It is an articulation between the occipital condyle and the facet on the lateral mass of the atlas.
Atlanto-Occipital Joint articular surfaces
Articular facets on the Atlas, articular surfaces of the Occipital Condyles
Atlanto-Occipital Joint joint capsule & synovial membrane
Each of the joints is enclosed by a loose fibrous capsule lined by synovial membrane. This attaches to the margins of the articular surface
what ligaments are present in the Atlanto-Occipital Joint
ant. & post. antlanto-occipital membrane
ligamentum nuchae
anterior antlanto-occipital membrane origin
ant. arch of atlas
anterior antlanto-occipital membrane inserton
ant. margin of foramen magnum
posterior antlanto-occipital membrane origin
post. arch of atlas
posterior antlanto-occipital membrane insertion
post. margin of foramen magnum
Ligamentum Nuchae origin
from spine of c7
Ligamentum Nuchae insertion
ext. occipital protuberance and crest
how does the Ligamentum Nuchae limit movement?
limits flexion
what movements occur in the Atlanto-Occipital Joint?
Flexion and Extension (20º)
Lateral Flexion (8º)
