Skip to Content

extensor pollicis longus (muscle)

 

Definition: muscle of posterior (extensor) compartment of forearm; origin, posterior surface of middle of shaft of ulna; insertion, dorsal aspect of base of distal phalanx of thumb; action, extends distal phalanx of thumb; nerve supply, radial (posterior interosseous).

Synonym(s): musculus extensor pollicis longusTA, long extensor (muscle) of thumb, musculus extensor longus pollicis

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

Hide