What is the main function of the coracoacromial ligament?

The main function of the coracoacromial ligament is to connect the coracoid process of the scapula to the acromion, forming a part of the shoulder structure that contributes to its stability and movement dynamics. This ligament creates a protective arch over the shoulder joint, which plays a crucial role in the biomechanics of the shoulder during activities that involve arm movement.

By linking these two bony structures, the ligament helps maintain proper alignment and support of the shoulder, facilitating smooth movement of the humerus within the glenohumeral joint. This connection is vital as it also helps transfer forces between the scapula and the rest of the upper limb, particularly during actions like lifting or reaching.

While some may mistakenly think other options pertain to the function of the coracoacromial ligament, they focus on other aspects of shoulder stability or motion management. However, the primary role of establishing a strong connection between the coracoid and acromion remains the foundational function of this ligament.