Peripheral Nerve Injuries · NEET PG Preparation Orthopaedics
A young adult sustains a posterior dislocation of the elbow. Post-reduction, the patient complains of tingling and numbness along the medial border o…
Practice question from Peripheral Nerve Injuries (NEET PG Preparation Orthopaedics), with the correct answer and a step-by-step solution.
medium · MCQ · Q-CF9C34
A young adult sustains a posterior dislocation of the elbow. Post-reduction, the patient complains of tingling and numbness along the medial border of the hand, little finger, and ulnar half of the ring finger, along with weakness in finger abduction and adduction (interosseous muscles). The site of nerve entrapment or injury is most classically at:
- A.Cubital tunnelCorrect answer
- B.Spiral groove
- C.Pronator teres muscle
- D.Guyon's canal
Solution
The ulnar nerve is most commonly injured at the elbow around the cubital tunnel, particularly during trauma such as elbow dislocations or fractures, or due to chronic traction/compression. It presents with sensory loss over the medial 1.5 fingers and intrinsic muscle weakness (claw hand deformity, loss of interossei/lumbricals 3-4).
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