Dr. Edward Chang is a neurosurgeon who specializes in treating drug-resistant epilepsy, facial pain, movement disorders and brain tumors. He has expertise in advanced brain mapping techniques, which can enable surgeons to remove diseased brain tissue, such as a tumor, while minimizing damage to healthy tissue needed for key functions, such as speech and movement. He also has extensive training in deep brain stimulation for movement disorders and other devices that treat disease by altering nerve activity.