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A separated shoulder, also known as acromioclavicular joint injury, is a common injury to the acromioclavicular joint. [2] The AC joint is located at the outer end of the clavicle where it attaches to the acromion of the scapula. [2] Symptoms include non-radiating pain which may make it difficult to move the shoulder.
The acromioclavicular joint provides the ability to raise the arm above the head. This joint functions as a pivot point (although technically it is a gliding synovial joint), acting like a strut to help with movement of the scapula resulting in a greater degree of arm rotation.
The coracoacromial ligament may impinge and compress rotator cuff muscle or tendon. [3] It may be damaged during a shoulder injury. [4]The attachment of the coracoacromial ligament may be moved from acromion to the end of the clavicle when reconstructing the acromioclavicular joint.
The onset of the pain may be acute if due to an injury or insidious if due to a gradual process such as an osteoarthritic spur. The pain has been described as dull rather than sharp, and lingers for long periods of time, making it hard to fall asleep. [2] Other symptoms can include a grinding or popping sensation during movement of the shoulder ...
Medical history (the patient tells the doctor about an injury). For shoulder problems the medical history includes the patient's age, dominant hand, if injury affects normal work/activities as well as details on the actual shoulder problem including acute versus chronic and the presence of shoulder catching, instability, locking, pain, paresthesias (burning sensation), stiffness, swelling, and ...
[1] [2] Pain medication such as paracetamol (acetaminophen) may be useful. [1] It can take up to five months for the strength of the bone to return to normal. [ 3 ] Reasons for surgical repair include an open fracture , involvement of the nerves or blood vessels, or shortening of the clavicle by more than 1.5 cm in a young person.
The acromioclavicular joint and sternoclavicular joint also play a role in shoulder movements. [3] White hyaline cartilage on the ends of the bones (called articular cartilage) allows the bones to glide and move on each other, and the joint space is surrounded by a synovial membrane. Around the joint space are muscles - the rotator cuff, which ...
The coracoclavicular ligament is a strong stabilizer of the acromioclavicular joint. [2] It is also important in the transmission of weight of the upper limb to the axial skeleton. There is very little movement at the AC joint. [citation needed]