Brachioradialis Muscle - Muscle Physiology & Functional Anatomy

Anatomy

Origin:

• Upper two thirds of lateral supracondylar ridge of humerus & lateral intermuscular septum
  

Insertion:

• Base of the styloid process (distal radius)

Major Arteries:

• Radial recurrent artery

Neural Innervation:

• Radial nerve (C5-C6)

Trigger Points:

Physiology

Concentric Functions:

• Elbow flexion
  

Eccentric Functions:

• Deceleration of elbow extension

Isometric Function:

Related Muscles

• Biceps Brachii

• Brachialis

Antagonist:

• Triceps Brachii
• Anconeus
  

Exercises:

• Forearm Exercise Videos

More Images of the Brachioradialis Muscle

More Information about the Brachioradialis Muscle

The brachioradialis muscle is a synergist of the biceps brachii.  It is a stronger flexor of the elbow when the forearm (radioulnar joint) is in mid position somewhere between supination & pronation.  When the forearm is pronated, the brachioradialis muscle is more active during flexion of the elbow because the biceps brachii does not have mechanical advantage. 

When the forearm is completely pronated, the brachioradialis tends to supinate as it flexes while the opposite action is true when the radioulnar joint is in a supinated position where it tends to pronate as it flexes.

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