Triceps Brachii Muscle: Lateral Head
Triceps Brachii Muscle: Long Head
The long head of the Triceps brachii is one of three heads that make up the muscle. It descends between teres minor and major, dividing the wedge-shaped interval between them and the humerus into triangular and quadrangular spaces.
Attachments of the Triceps Brachii Muscle Long Head : Origin and Insertion
Origin (proximal attachment)
a. Infraglenoid tubercle of the scapula.
Insertion (distal attachment)
a. Posterior olecranon process of ulna.
Actions of the Triceps Brachii Muscle Long Head:
Nerve to the Triceps Brachii muscle Long Head and its spinal segment:
a. Radial nerve (C7, C8).