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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.
Dorsal intercalated segment instability (DISI) is a deformity of the wrist where the lunate bone angulates to the dorsal side of the hand. [2] [3] Causes
The dorsal venous network of the hand is a venous network on the dorsum (backside) of hand. It is formed by the dorsal metacarpal veins (three in number), a dorsal digital vein from the radial (lateral) side of the index finger and one from the ulnar (medial) side of the little finger, and both dorsal digital veins of the thumb.
Rupture of the central slip occurs as a result of forceful impact on the dorsal (top) side of a flexed middle joint of a finger. [1] Severing of the central slip by lacerations or a dislocation of the middle phalanx towards the bottom of the finger causes the tendon to tear off the bone [ 1 ]
Paroxysmal hand hematoma is a skin condition characterized by spontaneous focal hemorrhage into the palm or the volar surface of a finger, which results in transitory localized pain, followed by rapid swelling and localized blueish discoloration.
If swelling persists, anti-inflammatory medications may be prescribed. [1] DIP Dislocation PIP Dislocation. A third degree sprain often results in a dislocation. [1] Volar and dorsal dislocations are treated differently, and treatment should be withheld if a fracture is suspected. In the case of a dislocation, closed reduction can be attempted. [3]
This condition which some people think is a self-inflicted (factitious) condition usually starts with a small accidental injury of the dorsum of the hand. This is usually followed by swelling edema and cyanosis of the dorsum of the usually right hand. The edema is thought to be secondary to excessive inflammation the condition slowly burns out ...
Anatomically, the abductor pollicis brevis and first dorsal interosseous muscle are more wasted than the abductor digiti minimi. [1] If lesions affecting the branches of the ulnar nerve that run to the wasted muscles are excluded, the lesion is almost sure to be located in the anterior horn of the spinal cord at the C8-T1 level. [2]