Related Experiment Video
Updated: Dec 22, 2025

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
Published on: August 8, 2019
Accounting for sleep loss in early modern England
1Department of History, University of Manchester, Manchester, UK.
Abstract:
How did people in the sixteenth and seventeenth centuries account for sleep loss? This article answers this question through an in-depth analysis of the life-writings of six early modern women and men that suffered from periodic or persistent episodes of sleep loss. It focuses on the ways in which these health crises were understood to impede the ordinary functions of body and mind, while also revealing how gendered discourses of illness shaped female and male explanations of sleep loss in different ways. The article is the first to identify early modern sleep loss as an acknowledged cause of poor mental health. It also sheds important light on how the distinctive medical culture of the period ca 1500-1700 encouraged ordinary householders to protect the quality of their sleep by moderating their bedtimes, diets, emotions, and by preparing soporific remedies for the home. This evidence shows that restorative sleep was treasured as an unparalleled guardian and barometer of physical, mental and spiritual health.
Related Concept Videos
Insufficient Sleep and Sleep Deprivation
Sleep deprivation is a more severe form of sleep loss...
Substance Use Disorders Affecting Sleep
Understanding the concepts of physical dependence,...
Understanding Sleep
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
Management of Insomnia
Sleep-Wake Cycles
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
Sleepwalking and Sleep Talking
Factors that increase the likelihood of sleepwalking include sleep deprivation and alcohol consumption. Contrary to common beliefs, it is safe...

