Neurology may be a branch of drugs handling disorders of the systema nervosum . Neurology deals with the diagnosis and treatment of all categories of conditions and disease involving the central and peripheral nervous systems, including their coverings, blood vessels, and every one effector tissue, like muscle. These disorders include epilepsy, Alzheimer disease and other dementias, cerebrovascular diseases including stroke, migraine and other headache disorders, MS , paralysis agitans , neuroinfections, brain tumours, traumatic disorders of the systema nervosum thanks to head trauma.