He did have a viral upper respiratory tract infection starting about 3 weeks ago. He works as a carpenter and denies any occupational exposures. If necessary, please revise your differential diagnosis based on the additional clinical history. Sensation is intact to pinprick and 2 point discrimination throughout the upper and lower limbs. Plantar responses are flexor.
Mental status is intact.
Cranial nerve examination is remarkable only for mild facial muscle weakness bilaterally, affecting both upper and lower areas of the face. At this point, review your differential diagnosis and revise as appropriate. Determine a final working differential diagnosis from which to design your electrodiagnostic study. Formulate your approach to the electrodiagnostic study.