What causes infraspinatus pain?
Pain in the infraspinatus is most likely caused by repetitive motion involving the shoulder. Swimmers, tennis players, painters, and carpenters get it more frequently. It also becomes more likely as you get older.
What are the shoulder adductors?
Adduction is accomplished primarily by the pectoralis major, latissimus dorsi, teres major, triceps, and coracobrachialis. The deltoid and the supraspinatus, a muscle that runs along the scapula in the back, are the two main abductors of the shoulder.
What muscles are shoulder external rotators?
Conclusion: The infraspinatus and teres minor are the main shoulder external rotators. The teres minor is more important as an external rotator in abduction than in adduction.
What do depressed shoulders look like?
A depressed shoulder is easy to spot. Things to look for: A downward slope of the shoulder girdle. Increased or reduced distance between the inside border of the shoulder blade and spine.
What is muscle under armpit called?
Pectoralis major: This large fan-shaped muscle stretches from the armpit up to the collarbone and down across the lower chest region. It connects to the sternum (breastbone). Pectoralis minor: The smaller of the pectoralis muscles, this muscle fans out from the upper ribs up to the shoulder area.
What are the internal rotators of the shoulder?
Subscapularis is the main internal rotator of the shoulder. It is the largest & strongest cuff muscle, providing 53% of total cuff strength. The upper 60% of the insertion is tendonous and the lower 40% muscle. It is a passive restraint in neutral, but not abduction.
What is the anatomy of the shoulder?
The Anatomy of the Shoulder. The acromioclavicular joint is where the acromion, part of the shoulder blade (scapula) and the collar bone (clavicle) meet. The glenohumeral joint is where the ball (humeral head) and the socket (the glenoid) meet. The rotator cuff connects the humerus to the scapula and is made up of the tendons of four muscles,…
What is the capsule of the shoulder joint?
The Shoulder Capsule. The shoulder capsule surrounds the ball-and-socket part of the shoulder joint. The capsule separates the joint from the rest of the body and contains the joint fluid. Several ligaments make up parts of the joint capsule, and these ligaments are important in keeping the shoulder joint in proper position.
What stabilizes the shoulder?
Numerous muscles help stabilize the three joints of the shoulder while giving it motion. At the shoulder, three major bones meet and create a 90-degree angle: Clavicle: Also known as the collarbone, the clavicle extends across the front of the shoulder from the sternum to the scapula. It helps stabilize the shoulder’s movements.
What are the three bones of the shoulder?
The three bones of the shoulder are the arm bone ( humerus ), shoulder blade ( scapula ), and collarbone (clavicle). The scapula has one part that forms a socket for the ball-and-socket shoulder joint; this is called the glenoid. The glenoid is covered with smooth cartilage.