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|Noun||1.||brain surgery - any surgical procedure involving the brain|
psychosurgery - brain surgery on human patients intended to relieve severe and otherwise intractable mental or behavioral problems
split-brain technique - brain surgery on animals in which the corpus callosum (and sometimes the optic chiasm) is severed so that communication between the cerebral hemispheres is interrupted
surgical operation, surgical procedure, surgical process, surgery, operation - a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body; "they will schedule the operation as soon as an operating room is available"; "he died while undergoing surgery"