The most common problems for which patients present to the emergency department are neurological disorders, including stroke, syncope, back pain and headache. The etiology of the patient's symptoms may be life-threatening, that is, when headache is due to subarachnoid hemorrhage or meningitis, or life-altering, that is, when back pain or weakness is due to spinal cord compression, if not diagnosed and treated urgently. This is a comprehensive textbook of the disorders that are neurological emergencies, including their differential diagnosis, diagnosis and treatment.