Neurosurgery, or neurological surgery, is the medical specialty concerned with the prevention, diagnosis, surgical treatment, and rehabilitation of disorders which affect any portion of the nervous system including the brain, spinal cord, central and peripheral nervous system, and cerebrovascular system. The specialty of neurosurgical care includes both adult and paediatric patients. Dependent upon the nature of the injury or disease a neurological surgeon may provide surgical and/or non-surgical care.