I was wondering what sort of signatures the muse might reliably be able to detect, as far as different stages of sleep, particularly REM. At the same time, would sleeping with it on be comfortable enough and would the connections be good enough?
It is definitely possible, from an electronic and computational perspective, to detect sleep stages with Muse. However, Muse is not physically designed with sleeping in mind. With a subject lying flat on their back or sitting in a chair and remaining relatively still, it could work. To get it to stay on regardless of position, you might have to come up with a custom solution. You could fashion a small elastic to wrap around the back of the head between the ear pods to make sure the headband remains on the head if the subject moves in their sleep, for instance.