What is ulnar nerve injury

summary

Wrist and elbow injuries are the most common, mild cases of skin bleeding, severe cases of ulnar nerve injury, resulting in ulnar side and little finger and ring finger ulnar side sensation disappeared. The severity is self-evident. Now let's take a look at the Department of ulnar nerve injury.

What is ulnar nerve injury

First, the ulnar nerve comes from the medial bundle of brachial plexus and descends along the medial side of the brachial artery. The middle part of the upper arm turns to the dorsal side gradually. It passes through the ulnar nerve groove behind the medial epicondyle of the humerus and passes between the ulnar head of the flexor carpi ulnaris and the humeral head. Then it enters the palmar side of the forearm between the flexor carpi ulnaris and the flexor digitorum profundus. It extends from the radial deep surface of the flexor carpi ulnaris to the wrist, and from the dorsal branch of the hand about 5cm above the wrist to the ulnar.

Second, the main trunk is divided into deep and shallow branches through the ulnar tunnel between pea bone and hook bone. The deep branch penetrates the thenar muscle into the deep part of the palm and dominates the thenar muscle, all the interosseous muscles, 3 and 4 vermiform muscles, adductor pollicis and medial head of flexor pollicis brevis. The superficial branch extends to the ulnar side of the palm and the skin of one and a half fingers on the ulnar side. Ulnar nerve injury leads to corresponding dysfunction.

Third, wrist injuries are mainly manifested as ring shaped hand deformity caused by paralysis of interosseous muscle, vermiform muscle and adductor pollicis muscle, adduction and abduction disorder and froment sign of fingers, sensory disturbance of ulnar half and one and a half fingers of hand, especially disappearance of sensation of little finger and atrophy of inner hand muscle. In addition to the above manifestations, there are flexion dysfunction of the ring and little finger.

matters needing attention

After ulnar nerve injury, the recovery of hand muscle will be very poor. It is necessary to repair the nerve as soon as possible and suture the wound. Avoid nerve damage after a long time does not repair, diet can consider eating some chicken claws.