Neurology (from Greek νεῦρον, neuron, "nerve"; and -λογία, -logia) is a medical specialty dealing with disorders of the nervous system. Specifically, it deals with the diagnosis and treatment of all categories of disease involving the central, peripheral, and autonomic nervous systems, including their coverings, blood vessels, and all effector tissue, such as muscle.[1] The corresponding surgical specialty is neurosurgery. A neurologist is a physician (not a surgeon) who specializes in neurology, and is trained to investigate, or diagnose and treat, neurological disorders. Pediatric neurologists treat neurological disease in children.