Oliver Bee RMTRegistered Massage Therapist

Massage therapy · Kitchener–WaterlooMedial Epicondyle Apophysitis in Children

Elbow, Wrist & Hand

What It Is

Little leaguer's elbow (medial epicondyle apophysitis) is a type of pain located on the side of the elbow that is closest to the body. It is an injury to the growth plate on the inner side of the elbow (Nationwide Children's Hospital, 2021). The elbow joint is made up of the humerus (upper arm bone) and the two forearm bones, the radius and the ulna (AAOS, n.d.). The epicondyles are the bony bumps at the lower end of the humerus. The bump that is closest to the body is the medial epicondyle. The muscles responsible for bending the wrist are attached to the medial epicondyle, while the muscles that straighten the wrist are attached to the lateral epicondyle. Repeated throwing makes the wrist-bending muscles pull again and again on the medial epicondyle, which puts stress on the growth plate there (Nationwide Children's Hospital, 2021; AAOS, n.d.).

In children, bones grow from growth plates, areas of growing tissue near the ends of the bones. The medial epicondyle has its own growth plate, which is a weak area. In this condition, that growth plate becomes irritated or injured through repeated stress (Nationwide Children's Hospital, 2021).

Medial Epicondyle Apophysitis in Children Anatomy

Three bones join together to make the elbow joint. The bone in the upper part of the arm is called the humerus. Two bones from the forearm, the radius and the ulna, make up the lower part of the elbow (AAOS, n.d.). All of the bones have a distinct shape. Ligaments that are connected to the bones work to keep everything in proper alignment.

The elbow is a combination of a hinge joint and a pivot joint (AAOS, n.d.). As the muscles relax and contract, two distinct motions occur at the elbow. The hinge part lets the elbow bend and straighten, which is known as flexion and extension. The pivot part lets the forearm twist so the palm turns down and up, which is known as pronation and supination (AAOS, n.d.).

Not a diagnosis — for more information, contact me or another trusted healthcare provider.

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