Anatomy of the Shoulder Girdle

Anatomy of the Shoulder Girdle

The shoulder is made up of the:

  1. Clavicle (collarbone)
  2. Scapula (shoulder blade)
  3. Humerus (arm bone)

The places where these bones attach form what is called a joint. The clavicle and scapula attach at the acromioclavicular (AC) joint, and the humerus and scapula attach at the glenohumeral (GH) joint. 

The scapula and humerus have to work together to move the arm in overhead, behind the back, and lateral directions. Stiffness in a joint can limit movement into one or many of these directions. 

Rotator Cuff Muscles

Muscle weakness can also interfere with ability to lift and move the arm. Four primary muscles help stabilize the GH joint for fluid movement, as a group called the rotator cuff:

  1. Supraspinatus
  2. Infraspinatus
  3. Teres Minor 
  4. Subscapularis
Share on facebook
Facebook
Share on google
Google+
Share on twitter
Twitter
Share on linkedin
LinkedIn

More to explore

Exercise Safely
Tips

Returning to Exercise Safely

Returning to Exercise Safely Everyone can agree that exercise and eating right are helpful to improving mental health, improving physical health and reducing the risk

Read More »
Total Joint Replacement
Uncategorized

Total Joint Replacement

Total Joint Replacement Where do I go after surgery? After joint replacement, you may require some degree of assistance from nursing, physical therapy, or occupational

Read More »

Leave a Reply