Triceps

Triceps or triceps brachii is a large muscle on the back of the upper limb of many vertebrates. It is the muscle principally responsible for extension of the elbow joint (straightening of the arm).

Anatomy

The triceps brachii has three heads. The long head arises from the scapula and the lateral and medial heads arise from the humerus. The fibers converge to a single tendon to insert onto the olecranon process of the ulna.

Function

The triceps brachii primarily functions to extend the elbow and adduct the arm. It is also involved in retroversion and adduction of the arm.

Clinical significance

Injury to the triceps can result in triceps tendonitis, a condition characterized by pain and swelling in the area where the triceps tendon attaches to the elbow.

See also

• Biceps
• Muscular system
• Human anatomy

References

Triceps Resources
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