or wear-and-tear arthritis—occurs commonly in the joint at the base of the thumb, where the thumb meets the wrist. This joint, called the carpometacarpal (CMC) joint or the basilar joint ...

Rheumatoid arthritis usually causes pain in both ... De Quervain's tenosynovitis occurs from overuse of the thumb and wrist. The primary symptom is pain along the thumb side of the wrist.

The median nerve is responsible for several different movements in the lower arm, including: Bending and straightening of the wrist Bending and straightening of the thumb, index, and middle ...