What is the exact definition of paralyzing dreams?

You are dreaming, you have a conscious awareness that you are stuck in the dream, you are trying to wake up and get out of the dream, and you are completely unable to move your body or exert any form of communication for help. It is like being under anesthesia, yet completely awake/aware of the surgery and not being able to do anything about it for a time. You do come out of it slowly. Not sure how your research converted a real medical phenomenon to alien abduction, but it sounds pretty cool.