What about the cranial nerve?

What about cranial nerves? Brain nerve, is the common people usually say, in fact, refers to mental illness. Demonstrated mental illness should go to a mental hospital, or to the psychiatric department of a general hospital to see a doctor, by the specialist to the patient's history of inquiry, detailed mental examination, in addition to doing some necessary auxiliary examination, after making a comprehensive judgment, understand the patient belongs to what type of mental illness, this mental illness is caused by what causes, and then according to the specific cause to prescribe the right medicine. So it is cranial nerve, must seize the time to go to the hospital to see a doctor.