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."