In the early 20th century, a frontal lobotomy was a common treatment for violent behaviors. Which descriptions procedure is accurate?

A surgical procedure that drills holes in the front of the skull to drain fluid.

A surgical procedure that severs the frontal lobes of the brain from the thalamus.

A procedure that delivers an electrical stimulus to the frontal lobes of the brain.

A surgical procedure that inserts implants into the frontal lobes of the brain.