Muscle Anatomy

Triceps Long Head

The long head of the triceps brachii, a substantial arm muscle, runs along the posterior aspect of the upper arm, contributing to powerful elbow movements.

Arising from the infraglenoid tubercle of the scapula, the long head of the triceps brachii has its origin on the shoulder blade.

The muscle inserts into the olecranon process of the ulna, forming the common tendon shared with the other heads of the triceps brachii.

The primary function of the long head of the triceps brachii is extension at the elbow joint. It plays a significant role in straightening the arm and is actively engaged in movements such as pushing, lifting, and supporting body weight during activities like dips or triceps-focused exercises. Additionally, the long head contributes to overall stability of the elbow and upper limb during various dynamic movements.