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

How can I stretch it?

How can I strengthen it?

Elbow Joint Muscles:

Related Articles

Biceps Brachii

The Biceps brachii crosses both the elbow and shoulder joints. It is a weak flexor of the shoulder joint but is a strong flexor the elbow joint, especially when the forearm is supinated (palm facing...

Brachioradialis

The Brachioradialis muscle acts to supinate the forearm from a pronated position, when it flexes the elbow. When starting in a supinated position, it acts to pronate the hand as it flexes the elbow.

Supinator

The supinator muscle assists Biceps brachii in supinating the hand, that is turning it over so that the palm faces up. To isolate the supinator muscle, supinate the hand whilst extending the elbow...

Brachialis

The brachialis acts to flex the elbow whether in pronation or supination, along with Biceps brachi. As Brachialis is attached to the Ulna, which cannot rotate, it is the only true flexor of the elbow.

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