Triceps Brachii

The Triceps Brachii also assists Latissimus Dorsi in extending the shoulder joint. It contracts strongly during the up phase of a push up, to straighten the arm.

Origin

• Long head - Lower part of the glenoid cavity of the scapula
  
  
• Lateral head - Upper half of the posterior surface of the humerus
  
  
• Medial head - Lower 2/3 of the posterior surface of the humerus

Insertion

• Olecranon process of the ulna

Actions

• Extension of the elbow

Innervation

• Radial nerve

Daily uses

• Pushing a door closed
  

Example strengthening exercises

• Tricep extension
  
  
• Overhead tricep extension
  
  
• Tricep dips

Example stretches

• Tricep stretch

Related injuries

• Inflammation or rupture of the triceps tendon

Related muscles

• Anconeus
  
  
• Latissimus dorsi