The diagnosis of RBD in narcolepsy patients is determined by clinical history , including that of the partner and confirmed by polysomnography ( PSG ) , because of a loss of REM atonia with excessive muscle tone .
Patients with narcolepsy are also more likely to develop RBD.The diagnosis is often taken based on polysomnography ( PSG ) records , mainly for its accuracy in differentiating RBD from other sleep disorders .
Parasomnia