Symptoms and signs of ulnar nerve injury

summary

In the wrist, ulnar nerve is easy to be cut. In fingers and palms, the digital nerve is easy to be cut or contused. The deep branch of ulnar nerve is the motor branch, sometimes it can be stabbed or penetrated. In the elbow, ulnar nerve often suffered from direct trauma or fracture dislocation combined with injury. Severe cubitus valgus deformity and ulnar nerve slippage caused by ulnar nerve injury, also known as cubital tunnel syndrome or chronic ulnar neuritis. General anesthesia, if not pay attention to protection, so that the hand hanging in the operating table, can cause paralysis due to too long compression. Ulnar nerve injury is the most common in cervical rib or anterior scalenus syndrome. Symptoms and signs of ulnar nerve injury? Let's talk about it

Symptoms and signs of ulnar nerve injury

The ulnar side of flexor carpi ulnaris and flexor digitorum profundus was hemiplegic and atrophied, and the wrist and distal finger joint of flexor ring could not be flexed to the ulnar side. When the fingers are flat, the little finger can't climb the table. The internal muscles of the hand were paralyzed extensively, including the hypothenar, interosseous muscles, the third and fourth Lumbricus, adductor pollicis and the medial head of flexor pollicis brevis. Obvious depression was found between the thenar and metacarpal bone.

Ring finger and little finger have claw deformity. The claw deformity of the elbow was mild; If the nerve supply of the deep flexor digitorum is injured on the far side, because the deep flexor digitorum digitorum loses the antagonism of the internal muscle of the hand, the claw deformity is obvious, that is, the metacarpophalangeal joint of the little ring finger is over extended and the interphalangeal joint is flexing. The interphalangeal joint cannot be extended while flexing the metacarpophalangeal joint. There was no claw deformity or only slight deformity in the middle finger due to the antagonism of the radial Lumbricus. The fingers can not be adducted or abducted. The paper clip test was positive. The thumb and index finger could not form a perfect "O" shape. The weakness of the two fingers was caused by adductor pollicis paralysis and instability of the metacarpophalangeal joint of the thumb. The little finger and thumb pinching obstacle. Because of the paralysis of the internal muscles of the hand, the grip strength of the hand is reduced by about 50%, and the flexibility of the hand is lost.

The sensation of ulnar side, little finger and ring finger disappeared.

matters needing attention

There is no effective preventive measures for this disease. Pay attention to health, do a good job in safety protection, reduce and avoid the stimulation of adverse factors and accidental injury, can play a preventive role. In addition, early detection, early diagnosis and early treatment are also the key to the prevention and treatment of this disease. In case of onset, active treatment and active intervention should be taken to prevent complications.