Joint Carpometacarpal Thumb (A. Carpometacarpea Pollicis, Pna, Bna; A. Carpometacarpicus Primus, Jna)

The thumb carpal joint is an important link between the hand and the rest of the fingers, providing flexibility and stability. This joint is known as the thumb carpometacarpal joint (PNA and BNA). It was named carpometacarpus primus in Latin. Extensive discussion of this joint usually refers to anatomical knowledge for the sake of the hand.

Like most other joints in the human body, the thumb wrist joint is ball-shaped. At its structural basis is the head of the ulna, which is in wide contact with the scaphoid and palmar region, forming the glenoid fossa, also known as the saddle notch. The lateral surface of the head is covered by humeral connective tissue, the mesophyseal tissue, which forms an area also known as the fibromembranous panel through which the fibers of the ligamentous complex pass.