Brain surgery and Psychosurgery

Brain surgery noun - Any surgical procedure involving the brain.

Psychosurgery and brain surgery are semantically related. In some cases you can replace term "Psychosurgery" with "Brain surgery", this terms are similar.

Psychosurgery noun - Brain surgery on human patients intended to relieve severe and otherwise intractable mental or behavioral problems.

Brain surgery and psychosurgery are semantically related. You can use "Brain surgery" instead a noun "Psychosurgery".