i was watching telly in bed and when i stood up, i fell to the floor because i had no power in my left leg,I tried to get up and fell again, my leg had no tone or power no associated heaviness, tingling pain, no neurological symptoms such as memory loss, slurred speech, headache. i sat for a minute and then my the power and tone had returned and i was able to mobilise as normal, i am 41 year old female, with no medical history