A lobotomy, or leucotomy, is a form of psychosurgery, a neurosurgical treatment of a mental disorder that involves severing connections in the brain's prefrontal cortex. Most of the connections to and from the prefrontal cortex, the anterior part of the frontal lobes of the brain, are severed. It was used for psychiatric and occasionally other conditions as a mainstream procedure in some Western countries for more than two decades. This was despite general recognition of frequent and serious side effects. While some people experienced symptomatic improvement with the operation, the improvements were achieved at the cost of creating other impairments.

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