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The muscles of the hand are the skeletal muscles responsible for the movement of the hand and fingers. The muscles of the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups. The extrinsic muscle groups are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm.
Hand injury. The hand is a very complex organ with multiple joints, different types of ligament, tendons and nerves. Hand disease injuries are common in society and can result from excessive use, degenerative disorders or trauma. Trauma to the finger or the hand is quite common in society. In some particular cases, the entire finger may be ...
In human anatomy, the dorsal interossei ( DI) are four muscles in the back of the hand that act to abduct (spread) the index, middle, and ring fingers away from the hand's midline (ray of middle finger) and assist in flexion at the metacarpophalangeal joints and extension at the interphalangeal joints of the index, middle and ring fingers. [ 1]
37385. Anatomical terms of muscle. [ edit on Wikidata] The lumbricals are intrinsic muscles of the hand that flex the metacarpophalangeal joints, [ 1] and extend the interphalangeal joints. [ 1][ 2] The lumbrical muscles of the foot also have a similar action, though they are of less clinical concern.
The interphalangeal joints of the hand are the hinge joints between the phalanges of the fingers that provide flexion towards the palm of the hand . There are two sets in each finger (except in the thumb, which has only one joint): Anatomically, the proximal and distal interphalangeal joints are very similar. There are some minor differences in ...
Structure. The flexor retinaculum is a strong, fibrous band that covers the carpal bones on the palmar side of the hand near the wrist. It attaches to the bones near the radius and ulna. On the ulnar side, the flexor retinaculum attaches to the pisiform bone and the hook of the hamate bone. On the radial side, it attaches to the tubercle of the ...
Wrist pain. Wrist pain or open wrist is a syndrome inhibiting use of a hand due to pain in anatomical structures of the wrist. [ 1] It most commonly results from an injury to a ligament. [ 1] The pain may be sharp from a traumatic injury or from chronic repetitive wrist activities. [ 1]
Additionally, hand and forearm pain related to phone use can also be a symptom of tendonitis, according to Swain. “If you use a muscle frequently, your body will send blood to that area to ...
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