Nightmares typically occur during the second half of a normal sleep period and involve distressing themes, usually related to imminent physical danger.

Authors

• Person: Colten HR, Altevogt BM Organization: National Academies Press
  Extent and Health Consequences of Chronic Sleep Loss and ... - NCBI

Sources

• Extent and Health Consequences of Chronic Sleep Loss and ... - NCBI www.ncbi.nlm.nih.gov Colten HR, Altevogt BM · National Academies Press via serper

Referenced by nodes (1)

• nightmares concept