A word used by doctors and nurses to imply that a patient's problems are
all in their mind. The tentorium is a membrane
just under the brain, so "supratentorial" refers to what is above that, namely the brain. This term can be used in
front of the patient or patient's family because it sounds like technical jargon.
Patient: "Every
time Dr Phil comes on TV, my arms and legs start twitching!"
Doctor, quietly to nurse: "Seems to be a supratentorial problem."
Then to patient, condescendingly: "
Sorry, dear, we're just talking shop. Go on."