What is M.E.? - M.E. is a neurological disease and stands for Myalgic Encephalomyelitis.: "These Xenon SPECT scans show pathological brain changes in a 37 year-old female M.E. patient. They show abnormally decreased brain perfusion (blood flow) which decreases further after exercise.
In contrast, a healthy person’s brain would normally show an increase in brain perfusion (blood flow) after exercise. Dr. Byron Hyde from the Nightingale Research Foundation, Canada, believes that every M.E. patient has some kind of abnormal SPECT scan. (Reference page 7, The Nightingale, Myalgic Encephalomyelitis M.E. Definition, 2007 :-