In Plain English
The forearm extensors are a group of muscles running along the back of the forearm, from the outside of the elbow toward the wrist and fingers. Together, they straighten the wrist and fingers while helping stabilize the hand during gripping and lifting. Although they’re less talked about than the forearm flexors, they create much of the muscular detail visible across the top of the forearm.
Technical Definition
The forearm extensors are a collection of muscles originating primarily from the lateral epicondyle of the humerus, with additional attachments along the ulna and radius. Their tendons pass across the back of the wrist to extend the wrist, fingers, and thumb, while several muscles also contribute to radial or ulnar deviation. During gripping tasks, they contract isometrically to prevent the wrist from collapsing into flexion, allowing the finger flexors to generate force more efficiently.
















