Video recordings can also yield a noninvasive measure of movement and therefore arousal.Video is also a useful adjunct to a comprehensive polysomnogram to evaluate body and head positioning, paradoxing, snoring, and mouth breathing. Studies correlating video scoring systems to standard poly­somnography have been encouraging.Future research will be necessary to validate the utility of a particular domiciliary video/audio study in a population with a well-characterized symptomatology.