Neuroscience
A 30-year-old man presents 6 weeks after a humeral shaft fracture with complete radial nerve palsy (wrist drop, finger drop). EMG shows no fibrillation potentials but absent motor unit potentials. There is Tinel's sign at the fracture site. The surgeon discusses the classification of nerve injuries and expected recovery. Regarding peripheral nerve injury classification:
Mark each as TRUE or FALSE
Seddon's classification includes neurapraxia (conduction block, myelin injury, no Wallerian degenera...
Sunderland expanded to five degrees: First degree (neurapraxia), Second degree (axon loss, endoneuri...
Neurapraxia involves complete nerve transection; Wallerian degeneration occurs in neurapraxia; axono...
Wallerian degeneration occurs distal to axonal injury: the distal axon fragments and degenerates wit...
Nerve regeneration occurs at approximately 1mm/day (1 inch/month) following Wallerian degeneration; ...
Answer the questions to see explanations
Click T (True) or F (False) for each option