The term brain surgery refers to various medical procedures that involve solving structural problems in the brain. Brain surgery is used to treat a variety of health problems in the brain, such as tumors, blood clots, aneurysms, epilepsy, and Parkinson's disease. There are many types of brain surgery. The type applied is based on the area of the brain and the condition being treated. Advances in medical technology have enabled surgeons to operate on parts of the brain without a single incision in or near the head. Brain surgery is a critical and complicated process.