Brachialis - Muscle Physiology & Functional Anatomy

 

Brachialis Muscle

Anatomy

 

Origin:

  • Anterior lower half of humerus & medial and lateral intermuscular septa

Insertion:

  • Posterior border of radial tuberosity (over bursa) & bicipital aponeurosis to deep fascia & subcutaneous ulna



Major Arteries:

  • Radial recurrent artery

 

Neural Innervation:

  • Musculocutaneous nerve (C5-C6) (from lateral cord)

  • Small supply from radial nerve (C7)

 

Trigger Points:

Trigger points of the Brachialis

 

Physiology

 

Concentric Functions:

  • Elbow flexion

Eccentric Functions:

  • Deceleration of elbow extension

 

Isometric Function:

 

Related Muscles


Antagonist:

Exercises:

 

 


More Images of the Brachialis Muscle

Brachialis Muscle (under biceps)

 

 

 


More Information about the Brachialis Muscle

The brachialis muscle is most active during isometric elbow flexion specifically when the elbow is at 90 degrees.  During dynamic elbow flexion the biceps brachii perform most of the work while the brachialis assists the elbow flexion.

 

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