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Other Terms: Articulatio acromioclavicularis, Articulation acromio-claviculaire
The acromioclavicular joint occurs between the acromial articular surface of the clavicle and the acromial articular surface of the scapula, and forms the connection between the two components of the shoulder girdle. The articulation may contain an articular disc, but if present it is small and varies greatly in the degree of its development. The disc is frequently incomplete and often entirely absent. The upper portion of the articular capsule is the strongest, and is still further reinforced by the acromioclavicular ligament. The acromioclavicular articulation has but a slight range of motion.