Anatomy Of The Thumb

The first dorsal interosseus also serves the thumb. This latter bone articulates with the distal phalanx at the interphalangeal joint.

Flexortendonrecovery Learn The Anatomy

This tendon travels along the back of the thumb and helps straighten the thumb.

Anatomy of the thumb. The upper extremity is a term used to define the upper limb. It differs from other digits in having only two phalanges tubular bones of the fingers and toes. The thumb generally receives oxygenated blood by the princeps pollicis artery.

The thumb is capable of opposition abduction adduction and retropulsion in addition to flexion and extension. The thumb also differs in having much freedom of movement and being opposable to tips of other digits. The muscles of the thumb all contain the word pollicis and are distinguished by extensor flexor oppenens and abductor designations.

Tables and diagrams summarizing the movements and innervation of the fingers and thumb are provided figure 5 and figure 6 and figure 7 and table 1 and table 2 and table 3. The hand is a very complex part of the body and all of the parts of the upper extremity are essential to functioning hands. The thumb is discussed below see thumb anatomy below.

Extensor pollicis brevis. The skeleton of the thumb consists of the first metacarpal bone which articulates proximally with the carpus at the carpometacarpal joint and distally with the proximal phalanx at the metacarpophalangeal joint. Thumb also called pollex short thick first digit of the human hand and of the lower primate hand and foot.

This tendon helps you bend the thumb. This tendon helps you move the thumb away from the palm to form an open hand. This includes the shoulder arm forearm wrist and hand.

This includes longus and brevis descriptions. There are four thumb tendons.

Skier S Thumb Physiopedia