Editing Triceps (section)

== Function ==
The triceps is an [[Extension (kinesiology)|extensor]] muscle of the elbow joint and an antagonist of the [[biceps]] and [[brachialis]] muscles. It can also fixate the elbow joint when the forearm and hand are used for fine movements, e.g., when writing. It has been suggested that the long head fascicle is employed when sustained force generation is demanded, or when there is a need for a synergistic control of the shoulder and elbow or both. The lateral head is used for movements requiring occasional high-intensity force, while the medial fascicle enables more precise, low-force movements.<ref name="Lucas"/>

With its origin on the scapula, the long head also acts on the shoulder joint and is also involved in [[retroversion]] and [[adduction]] of the arm. It helps stabilise the shoulder joint at the top of the [[humerus]].<ref name="Platzer-156" />