Perelman School of Medicine at the University of Pennsylvania

Center for Sleep and Circadian Neurobiology

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In the News

Astronaut Scott Kelly's DNA Did Not 'Change in Space' the Way You Think


A few mainstream news outlets recently misreported that seven percent of Astronaut Scott Kelly's DNA changed in space. Mathias Basner, MD, a professor of sleep and chronobiology, confirmed to Gizmodo that some of the news stories are flat out wrong.


Having Trouble Getting Enough Sleep? Blame Your DNA


Why can't we get the sleep we need? The most important clock is not on our nightstands, phones or watches— it’s in our bodies. “This biological clock is conserved in all life on Earth,” says David Dinges, PhD, chief of Sleep and Chronobiology. “That clock is in every cell of the body.”


Is Sleep Hygiene Effective in Treating Insomnia?


In all but the most chronic cases of insomnia, one technique often recommended to assist patients in falling asleep is sleep hygiene — such as, getting a new mattress, not sleeping with pets and avoiding certain beverages before bedtime. Philip R. Gehrman, PhD, an associate professor of Sleep Medicine discusses the effectiveness of sleep hygiene in treating insomnia.


Sleep Apnea Hurts Hearts RMT Audio


not for clips


Built for Health: Acoustics and Sound


Mathias Basner, MD, PhD, an associate professor of Sleep and Chronobiology in Psychiatry, shares insight on the "Built for Health" podcast about his research into sound and sleep.


How does space change the human body?


NASA's Twins Study sent one identical twin to space for a year, while the other stayed on Earth. Ten separate research projects then tracked how each twin changed. Mathias Basner, MD, PhD, an associate professor of Sleep and Chronobiology in Psychiatry, studied the cognition of both twins over the duration of the mission.


How a Better Night's Sleep Can Help Entrepreneurs Stay Calm and Focused at Work


Partial sleep deprivation can have a significant impact on a person’s mood. The article cites seminal research led by David Dinges, PhD, chief of Sleep and Chronobiology, which explored the dangers of insufficient sleep.


Sleep Apnea Hurts Hearts


Sleep apnea can severely damage your heart if left untreated. Ilene M. Rosen, MD, MSCE, a professor of Sleep Medicine and program director of the Penn Sleep Fellowship, discusses signs of sleep apnea and how to address the condition.


Survey: Single men need to wash their bed sheets more


A website asked 1,000 people how often they wash their sheets and pillow cases and discovered most go at least a month or so without changing them. Many do not wash their linens often enough. The article also includes mistakes some people make while trying to sleep. For example, sleeping on your stomach can cause neck and back pain in the long run, said Ilene Rosen, MD, a professor of Sleep Medicine.


Here's how much more sleep Americans are getting on average


According to data from 181,335 respondents aged 15 and older who participated in the American Time Use Survey (ATUS) between 2003 and 2016, most Americans averaged an extra 7.5 hours of sleep each year over the 14-year period. The analysis, led by Mathias Basner, MD, PhD, an associate professor of Sleep and Chronobiology in Psychiatry, was published last month in the journal Sleep.


By the Numbers: More Sleep, But We're Not All Winners


According to a study published last month in Sleep led by Mathias Basner, MD, PhD, an associate professor of Sleep and Chronobiology, most Americans are getting more sleep. The data differentiates between weekdays and weekends, and the big picture is a little less rosy in the latter.


Americans are Getting more Sleep now than they were 14 years ago


A new analysis in the journal Sleep, led by Mathias Basner, MD, PhD, an associate professor of Sleep and Chronobiology in Psychiatry, shows signs of success in the fight for more shut eye.


NASA Twins Study Investigators to Release Integrated Paper in 2018


NASA Twins Study investigators recently presented findings at the annual 2018 NASA Human Research Program Investigators' Workshop (IWS) in Galveston, Texas. Mathias Basner, MD, an associate professor of Sleep Medicine, studied Cognition by having twins Scott and Mark Kelly perform ten tests covering a range of cognitive performance.


Staying up late to watch the Super Bowl? Here are 9 ways to cope with Monday.


James Findley, PhD, clinical director of the Behavioral Sleep Medicine Program, offers tips on how to enjoy the Superbowl while still making your health a priority.


We’re Getting More Sleep. A Whole 18 Minutes. It’s Not Enough. - The New York Times


Americans are finally getting more sleep — about 18 minutes more per weeknight compared with 2003. It may not sound like much, but researchers say it’s a positive sign. Mathias Basner, MD, an associate professor of sleep and chronobiology in psychiatry and lead author of the analysis, is quoted.