Final answer:
The name for brain surgery in which the objective is to reduce symptoms of a mental disorder is prefrontal lobotomy.
Step-by-step explanation:
The name for brain surgery in which the objective is to reduce symptoms of a mental disorder is prefrontal lobotomy. This procedure was common in the 1940s and early 1950s, but is largely out-of-practice now. It involved severing the connections between the prefrontal cortex and other regions of the brain to treat various disorders, including personality disorders, mood disorders, and psychoses.