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Middle Glenohumeral Ligament

The middle glenohumeral ligament (MGHL) is a highly variable structure between individuals. It presents as either a discrete band or a thickening of the anterior capsule confluent with the inferior glenohumeral ligament (IGHL) complex in 60% to 80% of the population. The MGHL originates from the glenoid tubercle or the anterior labrum and inserts on the lesser tuberosity, coursing oblique to the SGHL and CHL.

The MGHL statically limits rotation of the adducted humerus, inferior translation of the adducted humerus and externally rotated humerus. In addition, the MGHL also limits anterior and posterior translation of the partly abducted (45 degree) and externally rotated arm.

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