Lobotomy: A now largely obsolete psychosurgical procedure that involved severing connections in the brain's prefrontal lobe.
Anterior Cingulotomy: A form of psychosurgery involving lesioning of the anterior cingulate cortex; often used for patients with severe OCD.
Capsulotomy: Another form of psychosurgery where lesions are made in the internal capsule; sometimes used for treating severe OCD or depression.