The Triceps Muscle - Explained

The only muscle to be found in the back of the arm, the triceps brachii, a large and thick muscle in fact originates from three heads, hence its name. The three heads are; the long head, medial head and lateral head. Some say it is shaped like a horseshoe. The lateral and long heads cover most of the medial head as shown above.
The triceps brachii is used to stabilise the shoulder and straightens the elbow joint. From a flexed position the long head can adduct and extend the humerus. When throwing objects or pushing a door closed it is the triceps brachii that it being used.
Causes of pain include; repetitive motion injury, repeated arm action including from sports such as tennis and basketball and lifting heavy objects with the palm upward facing.
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