💪 Triceps

Brian Lee
Jul 01, 2025
Reviewed

Summary

Origins

Long head: Infraglenoid tubercle of the 🦴 Scapula

Lateral head: Posterior humerus, above the radial groove

Medial head: Posterior humerus, below the radial groove

Insertions

📍 Olecranon process of the ulna

Actions

Extension of the forearm at the elbow

Long head: assists in extension and adduction of the arm at the shoulder

Stabilization of the shoulder joint

Illustrations

• Red: Long head
• Yellow: Lateral head
• Green: Medial head

Examples

Triceps Tendon

Translations

French

triceps brachial

Russian

трёхглавая мышца плеча

References

• Wikipedia
• 📕 Goldfinger 1991, 172-175.
• 📕 Hale And Coyle 1977, 80, 112, 122, 138, 140, 144, 146, 148-149, 150-151, 152, 182, 253, 254, 255, 256.

Related Muscles

• 💪 Anconeus The triceps brachii and anconeus are muscles that work together to straighten the elbow.
  • The triceps is the bigger muscle with three parts and does most of the work to extend the arm.
  • The anconeus is a smaller helper muscle near the elbow. It assists the triceps and helps stabilize the joint during movement.
  They are closely connected and often work as a team for elbow extension and stability.
• 💪 Teres Major
• 💪 Teres Minor
• 💪 Latissimus Dorsi