Triceps Anatomy

Anatomy of the Triceps Muscle
The triceps muscle is located in the upper arm and works in conjunction with the biceps muscle.  The opposing partnership of the triceps and biceps, as an agonist and antagonist pairing, results in bending and straightening of the arm at the elbow. The way to differentiate the two major muscles in the upper arm is that the triceps muscle initiates the extension of the elbow whereas the biceps muscle initiates the flexion of the elbow. Basically, when the triceps contracts the biceps relaxes to allow ease of movement. This is often referred to as an agonist and antagonist partnership. Please note that the triceps muscle is often referred to as the triceps brachia.

Related Injuries
- Triceps Strain
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Rupture of Triceps Tendon


Referenced Material
Anatomica’s Body Atlas. (2002). San Diego, CA: Thunder Bay Press (pg. 154, 158)