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Triceps Brachii (Long Head)
Region: Shoulder & Arm Muscles · All shoulder & arm muscles
Triceps Brachii (Long Head) at a glance
| Origin | Infraglenoid tubercle of the scapula |
|---|---|
| Insertion | Olecranon process of the ulna (common triceps tendon) |
| Actions | Straightens the elbow; Extends and adducts the arm at the shoulder |
| Nerve supply | Radial nerve (C6–C8) |
◆ Good to know
The only triceps head that crosses the shoulder, so it also steadies the humeral head when the arm is raised.
More Shoulder & Arm Muscles
Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.