Brachioradialis

Joe Muscolino

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Brachioradialis_HR

Anterior view of the right brachioradialis. The biceps brachii and brachialis are ghosted in. Permission Joseph E. Muscolino.

ATTACHMENTS:

  • The brachioradialis attaches from the lateral supracondylar ridge of the humerus to the styloid process of the radius.

 

ACTIONS:

  • Flexes the forearm at the elbow joint
  • Pronates the forearm at the radioulnar joints (from a position of full supination to a position that is halfway between full supination and full pronation)
  • Supinates the forearm at the radioulnar joints (from a position of full pronation to a position that is halfway between full supination and full pronation)
  • Flexes the arm at the elbow joint (reverse closed-chain action)

 

TRIVIA NOTE:

  • The brachioradialis is one of the three “B”s of elbow joint flexion. The other two are the biceps brachii and brachialis.
  • The brachioradialis is probably the best known example of a muscle whose joint action changes when the position of the joint changes. But many muscles have this ability.