Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
The abductor pollicis brevis is a muscle in the hand that allows for the abduction of the thumb, moving it away from the palm and other fingers. It plays a crucial role in grasping objects and manipulating tools by enabling thumb movement.
Related terms
Flexor Pollicis Longus: This muscle bends (flexes) the thumb towards the palm, aiding in gripping activities.
Opponens Pollicis: A muscle that rotates and brings the thumb across the palm, enabling pinching and precision grips.
Adductor Pollicis: This muscle draws the thumb towards the fingers, assisting in making a tight fist or gripping objects tightly