Golfers Elbow (Medial Epicondylitis) is caused when excessive muscular strain is exerted on a small bony point at the end of the humerus bone of the upper arm. If you sit at a table or desk and place your forearm on the table, crossing from left to right in front of you, then the medial epicondyle at the elbow is resting on the table surface.
Most of the muscles on the inside of the forearm (palm side), known as the flexor muscles, partially attach to the medial epicondyle. These muscles curl the fingers palm ward and are also responsible for bending the wrist palm ward.
Another powerful muscle called the Pronator Teres muscle attaches to the medial epicondyle as well. The Pronator Teres helps twist the forearm into a palm-down position. The combination of the flexor muscle group and the Pronator Teres cross the elbow joint and help stabilize the elbow.
If you would like to learn more about Golfers Elbow, or Medial Epicondylitis, visit the following sections: