Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
The abductor pollicis longus is a muscle in the forearm that facilitates the abduction and extension of the thumb away from the hand's palm. It plays an essential role in movements requiring thumb mobility, such as grasping or manipulating objects.
Related terms
Flexor Pollicis Longus: A muscle that flexes the thumb towards the palm, aiding in gripping actions.
Extensor Pollicis Brevis: A muscle that works alongside the abductor pollicis longus to extend and abduct the thumb.
Carpal Tunnel Syndrome: A condition often resulting from repetitive strain or overuse of muscles and tendons in the wrist, potentially affecting muscles like the abductor pollicis longus