Extensor pollicis longus

Definition

The extensor pollicis longus is a skeletal muscle located in the forearm that extends the thumb away from the palm, facilitating movements such as grasping or manipulating objects. It works by pulling on the distal phalanx of the thumb, allowing it to extend and rotate.

Related terms

Flexor Pollicis Longus: A muscle in the forearm that flexes the thumb towards the palm, opposing the action of the extensor pollicis longus.

Abductor Pollicis Longus: This muscle abducts (moves away) the thumb from the hand, working alongside extensor muscles for precise thumb movements.

Carpal Tunnel Syndrome: A condition often resulting from repetitive motion or overuse of muscles and tendons in the wrist, which can affect muscles including those controlling thumb movement