Coracoacromial Ligament

Description

Schematic representation of the coracoacromial ligament (CAL) attachment on the inferior surface of the anterior aspect of the acromion of a right shoulder. Also pictured are the trapezoid ligament and conoid ligament

Schematic diagram of a right shoulder showing the anterior coracoacromial ligament (CAL) bundle and the posterior coracoacromial ligament bundle with their mean attachment lengths and confidence intervals and the percentage of the lateral coracoid (% of C) that each structure occupies with confidence intervals

Name

• Coracoacromial Ligament
• Ligamentum Coracoacromiale

General

• Strong triangular ligament of the glenohumeral joint complex
• Connects the coracoid process to the apex of the acromion of the scapula
• Forms a strong arch above the head of the humerus, preventing superior displacement

Gross Anatomy

• Origin: medial border of the acromion
• Insertion: lateral border of the coracoid process
• Overlies the subacromial bursa

Function

• Forms coracoacromial arch
• Prevents superior displacement of humeral head

Coracoacromial Arch

• Formed from anterior to posterior: coracoid process, coracoacromial ligament, acromion
• Structures within arch: subacromial bursa, supraspinatus tendon, long head of biceps tendon

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Clinical Significance

• Subacromial Impingement Syndrome

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See Also

• Shoulder Pain Main
• Physical Exam Shoulder
• Shoulder Anatomy Main

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