nerve-injury-regeneration
A 32-year-old man sustains a closed humeral shaft fracture. Six weeks post-injury, he has complete wrist drop and finger drop with no recovery of radial nerve function. Electrodiagnostic studies show absent motor unit potentials in radial nerve-innervated muscles with fibrillation potentials. Which Sunderland grade of nerve injury is most likely?
Mark each as TRUE or FALSE
Grade I (neurapraxia) - Conduction block only with intact axons; recovery in days to weeks with no d...
Grade II (axonotmesis with intact endoneurium) - Axonal disruption but preserved endoneurial tubes; ...
Grade III (axonotmesis with endoneurial disruption) - Axon and endoneurium disrupted but perineurium...
Grade IV (axonotmesis with perineurial disruption) - Only epineurium intact; severe intraneural scar...
Grade V (neurotmesis) - Complete nerve transection with disruption of all layers including epineuriu...
Answer the questions to see explanations
Click T (True) or F (False) for each option