For the time being, I will upload some images I have found. Later on, I will edit for more description and explanation.
In my previous post, I included images of demons being exorcised as examples of the association between insanity and the demonic. I have more images, which I will include below as examples of healing the 'mad'.
Let us begin with the stone removal operations. (Much gratitude to Jessica Palmer's bioephemera; I had found these images on my own, but she has well surpassed my efforts with her impressive art history annotations.) The more recent works are actually characatures of 'quacks', so I'm including them under somewhat false pretenses.
Christ Cures a Madman
Christ exorcises a man's demons
The Possession of St. Catherine