Sleep Deprivation: Why Sleep in Teenagers is the 'Perfect Storm'

In our neuroscience seminar class at Loyola University Chicago, we discussed how biological and social factors interact to shape teenage sleep patterns. Our guest speaker, Stephanie Crowley, presented research on the “Perfect Storm” model of teenage sleep. This explains why teens often experience short and poorly timed sleep. This research focused on two biological systems, sleep homeostasis and the circadian rhythm. As a teenager, sleep pressure builds more slowly, causing teens to stay awake longer. Additionally, their circadian rhythm shifts, making them feel more awake and alert at night and less in the morning. The speaker emphasized the role of light exposure in influencing sleep timing and circadian rhythm. She discussed that while teenagers are not more sensitive to light than adults, increased exposure to evening light pushes sleep later. Psychosocial factors, like early school start times, social activities, and screen use at night delay sleep, but still require an early wake-up time. Despite needing nine hours of sleep a night, teenagers often get only around seven hours on school nights. These biological and psychosocial factors create the “Perfect Storm” that leads to chronic sleep deprivation in teenagers. 

A study by the University of Surrey, “Math Reveals Why Sleep Patterns Shift With Age, Light, and Routine”, connects to this idea. The study expands on the same “Perfect Storm” model described by Crowley by discussing the effects of light exposure in a mathematical model. Researchers used mathematical modeling to show how sleep is regulated by the interaction between sleep pressure, the body’s internal clock, and light exposure. Their findings suggest that late-night light exposure can disrupt the balance between these factors and create later sleep schedules, similar to Crowley’s findings. These results help explain why teenagers have a later sleep schedule, going to bed and falling asleep later, when exposed to bright light at night. 

Together, these studies highlight how teenage sleep patterns are a result of a combination of biology, psychosocial, and environmental factors. The speaker’s research explains how developmental changes in the brain, psychosocial factors, and exposure to light make teens naturally inclined to stay up later. The study by the University of Surrey builds on this by showing how light and biological systems interact mathematically to delay sleep. These findings, together, suggest that improving sleep in teenagers isn’t related to only changing individual behaviors as previously thought. It will require changes like later school times in order to account for the biological changes that cause later sleep schedules. Understanding how the interaction between biological, social, and environmental factors causes teenagers to struggle with sleep helps to create more effective solutions.

References:

Crowley, Stephanie J., et al. "An update on adolescent sleep: New evidence informing the perfect storm model." Journal of Adolescence, vol. 67, no. 1, 13 June 2018, pp. 55-65, https://doi.org/10.1016/j.adolescence.2018.06.001.

Njolinjo, D. (2025, July 22). Math reveals why sleep patterns shift with age, light, and routine. Neuroscience News. https://neurosciencenews.com/math-sleep-regulation-29512/