Looking for answers on 93 year old woman who has episodes of extreme weakness with inability to move her legs. Has been hospitalized several times over the past 3 months, initially for low sodium levels. Oxygen levels are 97, blood tests are normal. Heart monitoring revealed no problem other than a fib which she has had for years. She takes synthroid for thyroid, blood pressure medication, a calcium chanel blocker, a beta blocker. She uses a walker and is overall very weak. Skin appears somewhat yellow. Can normally get to the bathroom using walker and helper, but sometimes she just cannot make her legs move, and she then uses her lifeline to call an ambulance. At the hospital, tests are normal and diagnosis is weakness . Would like to determine if this is old age or if there is another issue we could investigate.