Posterior shoulder
Posterior Shoulder
The Posterior Shoulder (pronunciation: poh-STEER-ee-or SHOHL-der) is a term used to describe the back portion of the shoulder joint. The shoulder joint is a complex structure that includes several bones, muscles, and ligaments that allow for a wide range of motion. The posterior shoulder specifically refers to the area that includes the deltoid muscle, the infraspinatus muscle, and the teres major muscle, among others.
Etymology
The term "posterior shoulder" comes from the Latin words "posterior," meaning "behind," and "shoulder," which is derived from the Old English "sculdor," meaning "shoulder."
Anatomy of the Posterior Shoulder
The posterior shoulder is made up of several key components:
- Deltoid Muscle: This is a large, triangular muscle that covers the shoulder joint. It is responsible for arm rotation and allows the arm to move away from the body.
- Infraspinatus Muscle: This is one of the four muscles that make up the rotator cuff. It helps with the rotation and extension of the shoulder joint.
- Teres Major Muscle: This muscle is located in the upper arm and helps with the rotation and adduction of the arm.
Related Terms
- Anterior Shoulder: The front portion of the shoulder joint.
- Rotator Cuff: A group of muscles and tendons that surround the shoulder joint, providing stability and allowing for various movements.
- Glenohumeral Joint: The ball-and-socket joint that forms the main connection between the arm and the body.
- Scapula: Also known as the shoulder blade, it is a flat, triangular bone located in the upper back that connects the humerus (upper arm bone) with the clavicle (collarbone).
External links
- Medical encyclopedia article on Posterior shoulder
- Wikipedia's article - Posterior shoulder
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