Question: Explain why myelinated axons conduct action potentials faster than unmyelinated axons?
Once every few months, a 31-year-old female experiences episodes of physical weakness, clumsiness of the legs and hands, visual disturbances, and mood swings. The physical weakness is worst in her legs. CT scans show evidence of white matter lesions in the CNS. During her last episode, neurological deficits were more severe. Recent CT scans show an increasing number of lesions. Prednisone (60 mg/day for one week) was prescribed. The patient was able to resume a relatively normal and active life.