The proximal and distal ends of the humerus are cancellous bone with a superficial layer of compact bone.
The third is between the tubercles of the humerus, for the passage of the long tendon of the Biceps brachii. The Coracohumeral Ligament ligamentum coracohumerale.
Hint: Head of the humerus is articulated with a pectoral girdle cup-shaped joint.
It arises from the lateral border of the coracoid process, and passes obliquely downward and lateralward to the front of the greater tubercle of the humerus, blending with the tendon of the Supraspinatus. This ligament is intimately united to the capsule by its hinder and lower border; but its anterior and upper border presents a free edge, which overlaps the capsule.
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Glenohumeral Ligaments. These may be best seen by opening the capsule at the back of the joint and removing the head of the humerus.
One on the medial side of the joint passes from the medial edge of the glenoid cavity to the lower part of the lesser tubercle of the humerus. A second at the lower part of the joint extends from the under edge of the glenoid cavity to the under part of the anatomical neck of the humerus.
Anteroposterior and lateral radiographs are necessary for accurate diagnosis and treatment.
The humeral head makes up a portion of the ball-and-socket shoulder joint, which is the insertion point for muscles making up the shoulder girdle.
Nondisplaced fractures are treated initially with a posterior splint and eventual casting. Displaced fractures are reduced, and pinned percutaneously.
The Glenoidal Labrum. It is thicker above and below than elsewhere, and is so remarkably loose and lax, that it has no action in keeping the bones in contact, but allows them to be separated from each other more than 2. It is strengthened, above, by the Supraspinatus; below, by the long head of the Triceps brachii; behind, by the tendons of the Infraspinatus and Teres minor; and in front, by the tendon of the Subscapularis.
Malunion, compartment syndrome, and neurovascular complications are morbidities related to this fracture. This condition creates a varus rotation of the humerus causing decreased arm abduction and limited flexion at the shoulder joint.
However, functional impairment is not common.
What is the Humerus Bone
Surgical intervention involves a valgus osteotomy of the humerus using a plate screw fixation. Disappearing bone disease is a rare musculoskeletal condition marked by bone resorption, lack of bone formation, and lack of vascular proliferation.
This disorder has severe quality of life implications.
Common symptoms include aching pain, progressive weakness, and subsequent fractures. Treatment is challenging and involves a combination of surgical intervention, medication, and radiotherapy. The head of the radius articulates with the capitulum.
Capitulum on the lateral side and trochlea on the medial side of the Humerus The trochlea is spool-shaped medial portion of the distal humerus and articulates with the ulna.
Trochlea of the Humerus Epicondyles[ edit ] The epicondyles are continuous above with the supracondylar ridges. The lateral epicondyle is a small, tuberculated eminence, curved a little forward, and giving attachment to the radial collateral ligament of the elbow-joint, and to a tendon common to the origin of the Supinator and some of the Extensor muscles.
The medial epicondylelarger and more prominent than the lateral, is directed a little backward; it gives attachment to the ulnar collateral ligament of the elbow-joint, to the Pronator teresand to a common tendon of origin of some of the Flexor muscles of the forearm; the ulnar nerve runs in a groove on the back of this epicondyle. Medial and Lateral epicondyles of the Humerus Medial and lateral supracondylar ridges of the Humerus The Medial supracondylar crest forms the sharp medial border of the distal humerus continuing superiorly from the medial epicondyle.
Umărul trebuie să fie destul de mobil pentru a permite o mare gamă de acțiuni ale brațelor și ale mâinilor, dar de asemenea destul de stabil pentru a permite ridicări, împingeri și apăsări. Osteoarthritis As with most large joints, the head of the humerus is susceptible to osteoarthritis. This condition typically occurs with age and results from the wearing down of the cartilage at the end of a bone.
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This can cause significant pain from any and all joint motion. Each of these conditions can be treated conservatively meaning without surgery by a physical or occupational therapist, or by a doctor.
- Rehabilitation The humerus is the largest bone in the entire upper extremity.
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Treatment by a doctor may include surgery or their own conservative methods which typically includes injections for pain and inflammation. Though similar, there are different protocols to follow to treat fractures of the shaft or distal end of the humerus. Open and Closed Reduction Open reduction with internal fixation will occur in instances where doctors need to fixate the bone fragments using rods, screws, plates, or other hardware.
It articulates proximally with the glenoid via the glenohumeral GH joint and distally with the radius and ulna at the elbow joint. The most proximal portion of the humerus is the head of the humerus, which forms a ball and socket joint with the glenoid cavity on the scapula. What causes the radial head of the humerus to fracture?
The radial head is forced into the capitulum of humerus, causing it to fracture. How are the radius and ulna bones attached? The radius and the ulna are attached by the interosseous membrane.