Extensor Pollicis Longus- Muscle Physiology & Functional Anatomy

 

Extensor Pollicis Longus Muscle

Anatomy

 

Origin:

  • Middle 1/3 of posterior the ulna (below abductor pollicis longus) & adjacent interosseous membrane

Insertion

  • Base of distal phalanx of thumb via Lister's tubercle (dorsal tubercle of radius)



Major Artery:

  • Radial artery*

 

Neural Innervation:

  • Posterior interosseous nerve (C7-C8)

 

Trigger Points: 

 

 

Physiology

 

Concentric Functions:

  • Extends interphalangeal and metacarpophalangeal joints of the thumb

Eccentric Functions:


Isometric Function:


Related Muscles


Antagonist:


Exercises:

 

 


More Images of the Extensor Pollicis Longus Muscle

how to palpate the extensor pollicis longus muscle

Extensor Pollicis Longus


More Information about the Extensor Pollicis Longus Muscle

*The tendon of the extensor pollicis longus muscle crosses the radial artery along with the tendons of the extensor pollicis brevis & the abductor pollicis longus.

 

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