But Rapid-Eye-Movement cycles happens at some point in between deeper sleep cycles. In this case they claim to detect hypnagogia which from the article is the

But Rapid-Eye-Movement cycles happens at some point in between deeper sleep cycles. In this case they claim to detect hypnagogia which from the article is the early transition from wakefulness to sleep. In this stage you might have muscle relaxation or breathing pattern changes but probably not rapid eye movement.