What is Supratentorial?
1.
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."
See
2.
Adjective describing patient complaints that have no medical basis, most likely concocted.
Intern: Mrs. Smith is asking for demerol again for her headache.
Resident: Don't worry, it's all supratentorial.