Please choose the correct ending to complete the given sentence: Health: [header] How to diagnose nightmare disorder [title] Determine if you wake up from vivid nightmares. [step] One of the symptoms and diagnostic criteria of nightmare disorder is waking up often from vivid nightmares. You may remember many details from the dream, and the dream may have been extremely long or feel like it was very long.

Ending1: There may also be brain abnormalities, such as hyper-activity or delusions. [substeps] Sometimes you might have nightmares that persist for years, even after you establish normal sleep cycles. Ending2: This is something that should be evaluated by a mental health professional who specializes in nightmares. [substeps] Nightmares commonly happen in children but also in children, adolescents and adults who have advanced developmental disabilities. Ending3: [substeps] Nightmare disorder occurs most commonly in people who sleep at night. Few people feel the vivid nightmares before they wake up. Ending4: The nightmares often have narratives and are very elaborate. [substeps] In the nightmare, you may feel threats to your survival, security or self-esteem.

Answer format: ending1/ending2/ending3/ending4