If you used to be intelligent and good at puzzles and have difficulties now, it may be caused by sleep apnea (https://en.wikipedia.org/wiki/Sleep_apnea https://

If you used to be intelligent and good at puzzles and have difficulties now, it may be caused by sleep apnea (https://en.wikipedia.org/wiki/Sleep_apnea https://en.wikipedia.org/wiki/Sleep_apnea). I have moderated sleep apnea and since I take my medic (5 month), I have seen big improvements in memory and a slight improvement in my relationship with other people.