Neurology is the medical specialty that deals with the diagnosis and treatment of disorders of the nervous system, including the brain, spinal cord, and nerves. Physicians who specialize in this field are called neurologists and they treat conditions such as stroke, epilepsy, Parkinson's disease, Alzheimer's disease, multiple sclerosis, and various muscle and nerve disorders. Treatments can involve medication, surgical procedures, and diagnostic tests like a neurological exam, EEG, or lumbar puncture.