The lateral head of the triceps brachii, a powerful arm muscle, is situated on the posterior aspect of the upper arm, contributing to elbow movements.

Origin:
Arising from the posterior surface of the humerus, superior to the radial groove, the lateral head of the triceps brachii has its origin along the upper arm.

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

Function:
The primary function of the lateral head of the triceps brachii is extension at the elbow joint. It works in concert with the other heads of the triceps brachii to straighten the arm. Additionally, it contributes to stability during activities like pushing and lifting, playing a crucial role in various upper limb movements involving the extension of the elbow.

Overhead Triceps Press

Triceps Push-Down

45-Degree Triceps Extension

Triceps Kickback

Bench Press

Pushup