What is the difference between partial and full arousals from sleep?

Alert? The brain wave patterns recorded during a sleep study will in part define the partial/full arousal. Wakefulness pattern > 30 sec long: full arousal, wakefullness pattern < 30 sec: partial arousal (microarousal). Microarousals are not felt as awakening by the patient. You may be aware, if you wake up > 30sec.