A high-riding shoulder refers to the superior displacement/subluxation of the humeral head with resultant decrease in the acromiohumeral distance
What is the humeral head in the shoulder?
The humeral head is the “ball” part of the ball and socket It is made up 4 of components: Rounded joint surface – the head of the humerus which sits in the socket (glenoid) to form the shoulder joint A tuberosity is a distinct prominence or bump on a bone which is usually where a muscle or a ligament attaches
What is migration of the humeral head?
This migration of the humeral head upward is also called a superior subluxation because the ball is not in its proper position (subluxed) In some individuals the humeral head may not only migrate upward, but it may also migrate toward the front of the shoulder (called anterior migration or subluxation) as well
What causes humeral head pain?
Traumatic conditions are fracture, dislocation, or surgery of the shoulder which can result in humeral head necrosis There are many atraumatic causes of osteonecrosis of the humeral head such as corticosteroid use, excessive alcohol intake, sickle cell disease, divers’ disease, and other systemic diseases [1,2,3]
How do you assess a shoulder subluxation?
During physical examinations, subluxation is detected by palpation of the glenohumeral joint The extent of shoulder subluxation can be quantified by the distance from the acromion to the humeral head, using fingerbreadth, caliper, or tape
What causes high riding shoulder?
A high-riding shoulder refers to the superior displacement/subluxation of the humeral head with resultant decrease in the acromiohumeral distance The differential for a high-riding shoulder is: rotator cuff tear with or without rotator cuff arthropathy rheumatoid arthritis
What does humeral head mean?
Definition noun, plural: humeral heads The large rounded head of the humerus and articulates with the glenoid cavity of the scapula forming the glenohumeral joint
Why does shoulder subluxation occur?
A shoulder subluxation is often caused by: Trauma Subluxation can result from accidents or injuries that damage the shoulder’s joint or other structures that provide stability Common examples include falls and motor vehicle accidents
What muscle keeps shoulder in socket?
The muscles of the rotator cuff keep the humerus tightly in the socket The socket, or the glenoid, is shallow and flat It is rimmed with soft tissue called the labrum that makes a deeper socket that molds to fit the humeral head The joint capsule surrounds the shoulder joint
What is osteonecrosis of the humeral head?
Osteonecrosis of the humeral head is a condition where a portion of the bone of the humeral head (the top of the humerus or upper arm bone) loses its blood supply, dies and collapses Another term used for osteonecrosis is avascular necrosis
What is a glenoid labrum?
The glenoid labrum is fibrocartilaginous tissue within the glenoid cavity of the shoulder joint The purpose of the glenoid labrum is to provide stability and shock absorption within the joint
How are humeral head cysts treated?
The current surgical management for simple bone cysts is curettage and bone grafting through minimal incisions This case report appears to be the first documented case of arthroscopic treatment of a unicameral bone cyst with local autograft from the metaphyseal proximal humerus
What does subluxation feel like?
With a subluxation, you may feel the bone moving in and out of your socket Typically, you’ll experience a good deal of pain and swelling in your shoulder You may have trouble moving your arm or hear a clicking sound when you do so You may also feel numbness or tingling along your arm or in your fingers
Can subluxation fix itself?
While complete dislocations often need to be guided back into place, subluxations (as long as the joint remains in alignment) can heal on their own with proper rest, ice, elevation, anti-inflammatory medication (RICE) and a splint or brace for added support and stability
How do you palpate a humeral head?
humeral head Palpate in the axilla, posterior to the tendon of the pectoralis major Passively abduct your partner’s arm to feel the head move inferiorly greater tuberosity This structure is located about 1/2″ below the lateral edge of the anterior acromion process
What is Acromial Acetabularization?
Cuff tear arthropathy is characterized radiographically by a high-riding humeral head that causes superior glenoid and undersurface acromial wear, called acetabularization, because the rotator cuff is no long interposed between the humeral head and the acromion
What is shoulder dyskinesia?
Scapular dyskinesis (which may also be referred to as SICK scapula syndrome) is an alteration or deviation in the normal resting or active position of the scapula during shoulder movement For most people, the scapula moves in abnormal ways due to the repetitive use of the shoulder
What is rotator cuff arthropathy?
Rotator cuff tear arthropathy (or shoulder arthritis with a large rotator cuff tear) is a severe and complex form of shoulder arthritis in which the shoulder has lost not only the cartilage that normally covers its joint surface but also the tendons of the rotator cuff tear which help position and power the joint
What is the function of the head of humerus?
The head of the humerus makes up a portion of the ball-and-socket shoulder joint This area also serves as the insertion point for muscles which make up the shoulder girdle
Where is the humeral head located?
The humerus bone is located in the upper arm, between the shoulder joint and the elbow joint The shoulder joint, also known as the glenohumeral joint, is a ball and socket joint The ball is the humeral head, and the socket is the glenoid fossa of the scapula
Is humeral head proximal or distal?
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
Where is the anterior shoulder?
Anterior shoulder in obstetrics refers to that shoulder of the fetus that faces the pubic symphysis of the mother during delivery Depending upon the original position of the fetus, either the left or the right shoulder can be the anterior shoulder
How many bones does the humerus articulate with?
The humerus (/ˈhjuːmərəs/, plural: humeri) is a long bone in the arm that runs from the shoulder to the elbow It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections