Brachioradialis

Other Names

• Forearm (Upper-outer)
• Supinator longus (out dated)

Heads

• Brachioradialis

Movement

Elbow

• Flexion

Attachments

Origin

• Humerus
  • Lateral Condyle

Insertion

• Radius (Lateral Distal)
  • Styloid Process

Related Muscles

• Brachialis
• Biceps Brachii

Comments

The brachioradialis is a stronger elbow flexor when the radioulnar joint (forearm) is in a midposition between supination and pronation. When the forearm is pronated, the brachioradialis is more active during elbow flexion since the biceps brachii is in a mechanical disadvantage.

When the forearm is pronated, the brachioradialis tends to supinate as it flexes. In a supinated position, it tends to pronate as it flexes.