I begin to get upset when recently a specialist in neurology suggested I have early sign of Parkinson's disease, the second most common brain degeneration disease after Alzeihmer's disease. I just can't get myself to fall asleep even taking one and a half spleeping pill.
You are an excellent lecturer! At 12:15, I yelled out, "acetylcholine esterase inhibitor!" So I guess my old brain does remember some of the stuff we memorized in biology class!