The greater tuberosity is the prominent area of bone at the top of the humerus and is the attachment for the two large, powerful rotator cuff muscles – supraspinatus and infraspinatus. It is injured/fractured in a fall by either landing directly onto the side of your shoulder or landing with your arm outstretched.
What muscles attach to the humerus?
The muscles attached to the humerus are the deltoid, pectoralis major, teres major, latissimus dorsi, infraspinatus, teres minor, biceps brachii, coracobrachialis muscle, brachioradialus, triceps brachii and the anconeus.
What attaches to the lesser tubercle of the humerus?
The subscapularis muscle originates at the subscapular fossa and inserts into the lesser tubercle of the humerus.
Where does the humerus neck attach?
The surgical neck of the humerus is a constriction below the tubercles of the greater tubercle and lesser tubercle, and above the deltoid tuberosity, specifically found at the proximal end of the body of the humerus, and distally towards the greater tubercle and lesser tubercle.
What are the different parts of the proximal humerus?
In general, the more displaced parts, the worse the prognosis. The parts of the proximal humerus are called the tuberosities (the greater and lesser tuberosity), the humeral head (the ball of the shoulder), and the humeral shaft. The tuberosities are next to the ball and are the attachments of the important rotator cuff muscles .
What muscles attach to the tubercle of the humerus?
Bony Landmarks of Humerus. It connects with the glenoid fossa of the scapula to form the glenohumeral joint. Greater Tubercle is a large, roughened area placed lateral to the head. The infraspinatus, supraspinatus, and teres minor muscles attach to this elevation. Lesser Tubercle is a roughened area found medial to the greater tubercle.
What are the complications of proximal humerus fracture?
Complications. Unfortunately, proximal humerus fractures are often serious injuries, especially when the alignment of the bone has shifted significantly. Declines in shoulder function are not uncommon, and people who sustain these injuries often do not recover their full strength or mobility of the joint.
Where does the humerus articulate with the shoulder?
The humerus articulates proximal region by the scapula at the shoulder joint and radius and distal region with ulna at the elbow joint. Anatomical and surgical neck both of the humerus are highly susceptible to fracture.
