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Sleep Cycle
The sleep cycle: A sleep cycle lasts about 90 minutes and during that time we move through five stages of sleep. The first four stages make up our non-rapid eye movement (NREM) sleep, and the fifth stage is when rapid eye movement (REM) sleep occurs. NREM sleep: Across these four stages we move from very light sleep during Stage 1 down to very deep sleep in Stage 4. It is very difficult to wake someone who is in Stage 4 sleep. Across NREM sleep, we have little muscle activity and our eyes do not typically move, but all of our muscles retain their ability to function. REM sleep: As the name would imply – during this final stage of sleep, we have bursts of rapid eye movements. This is the stage of sleep in which most dreaming occurs. Our eyes are not constantly moving, but they do dart back and forth, up and down. These eye movements may be related to visual images of dreams, but that is not confirmed, and in general, the reason for these eye movements is still a mystery. Although our eyes are moving rapidly, the muscles that move our bodies are paralyzed (other important muscles, such as our heart and diaphragm continue to function normally).
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Switching our clocks twice a year is having a significant negative impact on our health.Written By: Savannah LoganAUG 07, 2025Cardiology
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A Johns Hopkins University research team examined the association among social media use, depression, and other health-r ...Written By: Kerry CharronFEB 01, 2024Cancer
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The sleep-wake cycle, or circadian rhythm, is closely related to many aspects of our biology, including food intake. Dis ...Written By: Carmen LeitchJAN 04, 2024Cardiology
Blue light before bed may not affect your circadian rhythm as much as you think it does.Written By: Savannah LoganJAN 03, 2024Cardiology
Staying up late may put your heart at greater risk.Written By: Savannah LoganNOV 28, 2023Genetics & Genomics
The hypothalamus is a small but crucial part of the brain that exerts control over a variety of critical functions like ...Written By: Carmen LeitchNOV 26, 2023Neuroscience
A 20-minute cycle improves cognitive performance under conditions of sleep deprivation and low oxygen. The corresp ...Written By: Annie LennonNOV 23, 2023Cardiology
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Deep sleep stimulation appears to improve cardiovascular function and may enhance recovery in athletes.Written By: Savannah Logan
SEP 25, 2025
Cardiology
Switching our clocks twice a year is having a significant negative impact on our health.
Written By:
Savannah Logan
AUG 07, 2025
Cardiology
Sleep habits and quality have been linked to over 100 diseases in a new study.
Written By:
Savannah Logan
JUL 23, 2025
Cell & Molecular Biology
New research may have finally shown why sleep is so crucial...
Written By:
Carmen Leitch
JUL 03, 2025
Cannabis Sciences
What impact can cannabis have for sleep apnea patients? This is what a recent report from the Office of Cannabis Managem
...
Written By:
Laurence Tognetti, MSc
APR 17, 2025
Cardiology
While people tend to focus on duration, multiple aspects of sleep health can impact your overall health.
Written By:
Savannah Logan
APR 03, 2025
Cannabis Sciences
How can pillowcases infused with cannabidiol (CBD) help improve sleep quality? This is what a recent study published in
...
Written By:
Laurence Tognetti, MSc
FEB 27, 2025
Cardiology
Blue light exposure in the morning may improve your sleep and activity levels throughout the day.
Written By:
Savannah Logan
FEB 14, 2025
Cannabis Sciences
Is cannabis a better sleep aid than prescription medications? This is what a recent survey conducted by incredibles, whi
...
Written By:
Laurence Tognetti, MSc
NOV 22, 2024
Cannabis Sciences
A study published in Neuropsychopharmacology indicated that cannabinol (CBN) sleep-promoting properties comparable to co
...
Written By:
Kerry Charron
NOV 11, 2024
Microbiology
The human gut microbiome, or the trillions of microbes in the gastrointestinal tract, are essential to our health. These
...
Written By:
Carmen Leitch
OCT 14, 2024
Earth & The Environment
Per- and polyfluoroalkyl substances (PFAS) have been introduced into countless consumer products and materials, and now
...
Written By:
Carmen Leitch
SEP 11, 2024
Cardiology
Using a screen in bed may negatively impact your sleep.
Written By:
Savannah Logan
AUG 28, 2024
Health & Medicine
A new study published in Annals of Epidemiology examined the effects of childhood sleep patterns on future substance use
...
Written By:
Kerry Charron
JUN 24, 2024
Neuroscience
Regular snoring is linked to uncontrolled high blood pressure, especially in overweight middle-aged men.
Written By:
Annie Lennon
JUN 12, 2024
Cannabis Sciences
A Johns Hopkins University research team examined the association among social media use, depression, and other health-r
...
Written By:
Kerry Charron
FEB 01, 2024
Cancer
The circadian clock describes the 24-hour internal clock in our brains. The rhythms that regulate our awake and sl
...
Written By:
Katie Kokolus
JAN 06, 2024
Genetics & Genomics
The sleep-wake cycle, or circadian rhythm, is closely related to many aspects of our biology, including food intake. Dis
...
Written By:
Carmen Leitch
JAN 04, 2024
Cardiology
Blue light before bed may not affect your circadian rhythm as much as you think it does.
Written By:
Savannah Logan
JAN 03, 2024
Cardiology
Staying up late may put your heart at greater risk.
Written By:
Savannah Logan
NOV 28, 2023
Genetics & Genomics
The hypothalamus is a small but crucial part of the brain that exerts control over a variety of critical functions like
...
Written By:
Carmen Leitch
NOV 26, 2023
Neuroscience
A 20-minute cycle improves cognitive performance under conditions of sleep deprivation and low oxygen. The corresp
...
Written By:
Annie Lennon
NOV 23, 2023
Cardiology
Melatonin is growing in popularity, but it's probably not the best way to get a good night's rest.
Written By:
Savannah Logan
OCT 17, 2023
Cancer
Introduction CAR-T therapies represent a new successful strategy for the treatment of hematological malignancies; howeve
...
Sponsored By:
Sino Biological
OCT 12, 2023
Cardiology
Deep sleep stimulation appears to improve cardiovascular function and may enhance recovery in athletes.
Written By:
Savannah Logan