In birds and reptiles, the coracoid is a separate bone.Ĭoracoid in itself means "like a raven's beak", with reference to its shape. Major neurovascular structures enter the upper limb medial to the coracoid process so surgical approaches to the shoulder region always takes place lateral to the coracoid process. It is otherwise known as the "Surgeon's Lighthouse" because it serves as a landmark to avoid neurovascular damage. The coracoid process is palpable just below the lateral end of the clavicle (collar bone). On the medial part of the root of the coracoid process is a rough impression for the attachment of the conoid ligament and running from it obliquely forward and lateralward, on to the upper surface of the horizontal portion, is an elevated ridge for the attachment of the trapezoid ligament. The horizontal portion is flattened from above downward its upper surface is convex and irregular, and gives attachment to the Pectoralis minor its under surface is smooth its medial and lateral borders are rough the former gives attachment to the Pectoralis minor and the latter to the coracoacromial ligament the apex is embraced by the conjoined tendon of origin of the Coracobrachialis and short head of the Biceps brachii and gives attachment to the coracoclavicular fascia. The antagonist of the coracobrachialis is the deltoid. The short head of biceps brachii muscle to radial tuberosity. The ascending portion, flattened from before backward, presents in front a smooth concave surface, across which the Subscapularis passes. Muscles and tendons of the rotator cuff slip underneath the coracoid and the acromion to attach to the humerus (upper arm bone). Other muscles that are attached to the coracoid process include the pectoralis minor and the biceps brachii. Function The pectoralis minor muscle to 3rd, 4th, 5th and on some rare occasions, 6th rib. The coracoid process is a thick curved process attached by a broad base to the upper part of the neck of the scapula it runs at first upward and medialward then, becoming smaller, it changes its direction, and projects forward and lateralward. The coracoacromial ligament - to the acromion.(It is formed by the conoid ligament and trapezoid ligament.) (Coracoid means like a ravens beak in Greek.) This weeks muscle, the coracobrachialis, is a slender muscle that starts at the coracoid process and runs. The coracoclavicular ligament - to the clavicle.The coracobrachialis muscle - to medial humerus.
The short head of biceps brachii muscle - to Radial tuberosity.The pectoralis minor muscle - to 3rd to 5th ribs.It is the site of attachment for several structures:
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