Historical Surgery Removing Part of the Brain
Puzzle 1 of City Nicknames Hard Pack
Question is: Historical Surgery Removing Part of the Brain
and the answer is: LOBOTOMY
Word Meaning:
LOBOTOMY — (surgery, chiefly historical) A surgical operation involving cutting into a lobe of a body organ, specifically (neurosurgery), a procedure, now largely disused, involving severing connections between the prefrontal cortex and the thalamic region of the frontal lobe of the brain to treat certain mental illnesses.
Definitions from Wiktionary.