Neurology Main 11-20,Q 11,A 36-year-old Caucasian male is brought to the emergency department due to weakness of his upper and lower extremities. Neurological examination reveals weakness, atrophy, fasciculations, spasticity and hyperreflexia of the involved muscles. His sensory, bowel， bladder and cognitive functions are intact. Serum creatine kinase is normal. Cerebrospinal fluid examination is within normal limits. Electromyography shows chronic partial denervation. The patient is subsequentl
