Anatomy Of Thumb

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. This tendon helps you move the thumb away from the palm to form an open hand.

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The thumb generally receives oxygenated blood by the princeps pollicis artery.

Anatomy of thumb. It differs from other digits in having only two phalanges tubular bones of the fingers and toes. Having a skeleton of phalanges joined by hinge like joints that provide flexion toward the palm of the hand. Having a dorsal surface that features hair and a nail and a hairless palmar aspect with fingerprint ridges.

The thumb shares the following with each of the other four fingers. Extensor pollicis brevis. This nerve gives sensation to the thumb index finger long finger and half of the ring finger.

This tendon helps you bend the thumb. 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 muscles of the thumb all contain the word pollicis and are distinguished by extensor flexor oppenens and abductor designations.

Thumb also called pollex short thick first digit of the human hand and of the lower primate hand and foot. The thumb also differs in having much freedom of movement and being opposable to tips of other digits. This tendon travels along the back of the thumb and helps straighten the thumb.

The thumb is capable of opposition abduction adduction and retropulsion in addition to flexion and extension. There are four thumb tendons. This includes longus and brevis descriptions.

The upper extremity is a term used to define the upper limb. The thumb is discussed below see thumb anatomy below. The first dorsal interosseus also serves the thumb.

This includes the shoulder arm forearm wrist and hand. It also sends a nerve branch to control the thenar muscles of the thumb. The thenar muscles help move the thumb and let you touch the pad of the thumb to the tips each of each finger on the same hand a motion called opposition.

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