How does forearm have pronation deformity to cause?

summary

When the radial nerve of the upper arm is injured, all extensors are paralyzed. Triceps brachii, brachioradialis, extensor carpi radialis, pronator, extensor digitorum communis, extensor carpi ulnaris and extensor digitorum propria are paralyzed, Adduction deformity of the thumb. Median nerve injury: Supracondylar Fracture of the humerus can occasionally cause compression injury of the median nerve, which can often recover by itself after fracture reduction. After injury, the thumb, index finger and middle finger can not be flexed, the thumb can not be abducted and palmar, and the three half fingers on the radial side of the palm have sensory impairment. Let's share my experience with you.

How does forearm have pronation deformity to cause?

Because the radial nerve is close to the humerus in the upper arm and close to the radius in the forearm, the fractures are often injured at the same time; In the process of fracture healing, it is often buried in the callus. To injure by pulling or pressing. For example, the upper limb abduction is too long or the head pillow upper arm falls asleep. Excessive callus growth or dislocation of the radial head can also compress the radial nerve.

Pronation deformity of forearm is the clinical manifestation of radial nerve injury during exercise. The radial nerve is close to the shaft in the middle and lower 1 / 3 of the humerus, where the radial nerve is easy to be damaged when the humerus is fractured. The sensation and triceps brachii and posterior elbow muscles were not affected. Extensor carpi longus radialis was good. Other extensors were paralyzed.

Triceps brachii and extensor carpi should be examined in the direction of anti gravity. The thumb lost abduction, could not stabilize the metacarpophalangeal joint, and the thumb function was seriously impaired. Because of the paralysis of extensor carpi ulnaris and extensor carpi radialis, it is difficult to move the wrist to both sides. The muscle atrophy of the dorsal forearm was obvious. Most of the radial nerve injuries in the dorsal forearm were interosseous dorsal nerve injuries.

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Because the radial nerve is close to the humerus in the upper arm and close to the radius in the forearm, the fractures are often injured at the same time; In the process of fracture healing is often buried in the callus, will cause forearm rotation deformity.