MRCP UK EXAMINATIONS

Detailed explanation-1: -Claw hand is usually caused by damage to your ulnar nerve, which controls muscles in your ring and pinkie fingers. If your ulnar nerve is damaged, the muscles it controls don’t get some or all of the electrical signals that tell them to straighten.

Detailed explanation-2: -The ulnar claw hand deformity (Fig. 3) is an advanced symptom of ulnar nerve entrapment below the elbow and typically causes flexion and clawing of the fourth and fifth fingers; this is due to a deficit in the third and fourth lumbricals, allowing the FDP to overpower the hand function.

Detailed explanation-3: -Ulnar tunnel syndrome occurs when the ulnar nerve is compressed at the wrist. This reduces blood flow to the nerve and can harm its function. When compressed at the wrist, the malfunction of the nerve can cause numbness and tingling in the little finger (pinky) and the outside of the ring finger.

Detailed explanation-4: -The causes of Claw Hand might include: Nerve damage in the arm e.g ulnar palsy, median palsy, ulnar tunnel syndrome, cubital tunnel syndrome.