Question #84
The acromioclavicular joint is weak and a direct blow can easily cause dislocation of this joint. Which of the following features provides the most extra-strength to the joint?
The acromioclavicular ligament runs between the acromion and the clavicle and strengthens the joint superiorly.
The coracoclavicular ligament is extrinsic to the acromioclavicular joint however it consists of two very strong bands which provide extra support and strength to the otherwise weak joint.
An incomplete wedge-shaped articular disc sits between the fibrocartilage lining the articular surfaces of the acromioclavicular joint. It does not increase the strength of the joint.
The whole joint is surrounded by a weak loose fibrous capsule which is reinforced superiorly by trapezius.