A manual of anatomy . OCCIPITAL BONE The atlantooccipital articulation (articidatio atlantooccipitalis) isa diarthrosis. The ligaments are as follows: 1. A capsular ligament that surrounds each condyle of theoccipital bone and corresponding facet of the atlas. 2. The ventral atlantooccipital membrane {membrana atlantooccip-italis anterior) extends from the ventral arch of the atlas to theventral margin of the foramen magnum and is thickened in themedian line. 3. The dorsal atlantooccipital membrane extends from the dorsalarch to the dorsal margin of the foramen magnum. Both arecontinuous with
A manual of anatomy . OCCIPITAL BONE The atlantooccipital articulation (articidatio atlantooccipitalis) isa diarthrosis. The ligaments are as follows: 1. A capsular ligament that surrounds each condyle of theoccipital bone and corresponding facet of the atlas. 2. The ventral atlantooccipital membrane {membrana atlantooccip-italis anterior) extends from the ventral arch of the atlas to theventral margin of the foramen magnum and is thickened in themedian line. 3. The dorsal atlantooccipital membrane extends from the dorsalarch to the dorsal margin of the foramen magnum. Both arecontinuous with the capsular ligaments. 4. The alar, or check, ligaments (ligg. alaria) are two short, strong THE MANDIBULAR ARTICULATION I15 cords extending right and left from the sides of the apex of the densto the condylar portions of the occipital bone. 5. The ligament of the apex {lig. apicis denlis) extends from theapex of the dens to the ventral margin of the foramen magnum. Occiitital bone Posterior atlanto-occipital nbrane. Groove forvertebral artery --^ Fig. 85.—A portion of the occipital bone together with the atlas and axis (epistropheus)and their ligaments seen from laehind. On the left side the capsule of the atlanto-epistropheal articulation has been removed. {Sobotta and McMurrich.) Movements.—Between the occipital bone and the atlas, a rockingmotion is accomplished (nodding) as well as a limited amount ofoblique motion. THE MAISTDIBULAR ARTICULATION The mandibular articulation {articulatio mandibiilaris) is aginglymo-arthrosis and the parts concerned are the condyles of themandible and the mandibular fossa; of the temporal bones. Anintraarticular cartilage (disc) intervenes between these bones, however. 1. The loose capsular ligament is attached to the edges of thefossa and to the neck of each condyle. 2. The temporomandibular ligament (lig. ternporomandibidare) is athickening of the lateral wall of the capsule and extends betweenthe inferior margin of the zygoma and the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthumananatomy, bookyea
