@cheyne and @calanbrown, i too have had 3 TIA(mini strokes). i've had CT scans, MRIs, even Ultrasounds looking for ruptured blood vessels. you name it, nothing found. to this day, 5 years later nothing has happened again. as far as we now. they don't leave any known signs. no clues. so far it's a mystery. ALL I CAN SAY IS GOOD LUCK. but don't take anything for granted. something don't seem right, get it checked out immediately. GET TO THE ER FAST. good luck, Daniel.