What movements occur at the scapulothoracic joint?
The movements within the scapulothoracic junction are described into three degrees of freedom; elevation-depression, protraction-retraction, external rotation-internal rotation.
What is the Scapulothoracic motion?
The scapulothoracic motion interface is the site of movement between the scapula (shoulder blade) and the thorax (chest wall). The scapula moves around the chest in many daily and athletic activities. This motion does not take place between layers of muscles which separate the scapula from the ribs.
What does the scapulothoracic joint do?
The main function of the scapulothoracic articulation is to center the socket part of the shoulder joint to the ball of the arm during elevation of the arm. It also adds range to the arm when reaching overhead.
Is the scapulothoracic joint a gliding joint?
The scapulothoracic joint is not a true synovial joint. Rather, the scapulothoracic articulation is formed by the convex surface of the posterior thoracic cage and the concave surface of the anterior scapula. The scapula is a flat bone, with the gliding surfaces formed by the subscapularis and the serratus anterior.
How does the scapula move during shoulder flexion?
During shoulder flexion, the scapula should: upwardly rotate, posteriorly tilt, and externally rotate slightly at end range. Watch that these motions occur without too much adduction or abduction.
What type of joint is Scapulothoracic?
What controls the scapulothoracic joint?
The coracoacromial ligament connects the coracoid process to the acromion. There are two major bursae: the scapulothoracic bursa, between the serratus and the thorax, and the subscapularis bursa, between the subscapularis and the serratus….Anatomy.
| Muscle | Innervation | Movement |
|---|---|---|
| Rhomboid minor | Dorsal scapula | Adducts scapula |
Why scapulothoracic joint is called a false joint?
The sternoclavicular (SC) joint supports the connection of the arms and shoulders to the main skeleton on the front of the chest. A false joint is formed where the shoulder blade glides against the thorax (the rib cage).
What is Scapulothoracic rhythm?
Scapulohumeral rhythm: the coordinated motion of the scapula and humerus experienced during shoulder movement and motion that has been traditionally viewed as occurring at a ratio of 2:1 (2 degrees of humeral flexion/abduction to 1 degree of scapular upward rotation).
What is abduction of the scapula?
Protraction of the scapula is sometimes called abduction of the scapula. The scapula is moved laterally and anteriorly along the chest wall. Muscles: serratus anterior is the prime mover.
What type of joint is scapulothoracic joint?
How much does the scapula move?
The scapula contributed 2.53% of total motion for the first 30 degrees of shoulder elevation, between 20.87% and 37.53% for 30o-90o of shoulder elevation, and 52.73% for 90o-120o of shoulder elevation.
How do you fix scapular rhythm?
Wide Grip Shrug This will place the arm in some abduction and the scapula in upward rotation. Slowly elevate the scapula towards the ear. Perform three sets of 20 slow repetitions with a hold. This is a great starter exercise for a patient with shoulder pathology because the arm is in relative neutral abduction.
What is scapular adduction?
Scapular Adduction – Also called scapular extension or retraction. It is a movement the opposite of abduction. Throwing the shoulder back and pinching the shoulder blades together illsutrates adduction of the shoulder girdles.
What is the Scapulothoracic rhythm?
How does the scapula move in shoulder flexion?
What joints are in the scapula?
The shoulder joint itself known as the Glenohumeral joint,(is a ball and socket articulation between the head of the humerus and the glenoid cavity of the scapula)
What are the movements of the scapula?
Elevation: movement that allows the shoulder girdle to move upwards as in shrugging the shoulders.
What movements can occur at the shoulder joint?
The difference between the Shoulder Joint and the Shoulder Girdle
What are the scapulothoracic muscles?
The medial stabilizers of the scapula; levator scapulae and rhomboid muscles. These muscles are also the main muscles of the scapulothoracic motion, while the muscles of the chest wall and the back assist them. The innervation of the scapulothoracic junction refers to the nerves that supply the main muscles of the scapulothoracic motion;