Lobotomy: Surgical incision into the frontal lobe of the brain to sever one or more nerve tracts, a technique formerly used to treat certain mental disorders but now rarely performed.

• 脑白质切除术一种外科手术,即切入脑部额叶切除一个或几个神经束。以前经常用于治疗精神混乱症,但现已废除。