TRAUMA

Following closed reduction and splinting of a closed humeral shaft fracture, the patient demonstrates a new-onset inability to extend the wrist and fingers. What is the most appropriate initial step in management?

A Immediate surgical exploration of the radial nerve
B Magnetic Resonance Imaging (MRI) of the humerus
C Immediate Electromyography (EMG)
D Observation and expectant management for 3-4 months