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).
What's Popular in Sleep Cycle
-
SEP 02, 2019Genetics & Genomics
SEP 02, 2019Typically, people need between seven and eight hours of sleep per night to function properly. In fact, reducing sleep by just one or two hours for a ...Written By: Annie LennonJUN 11, 2019Health & Medicine
JUN 11, 2019Are you exposed to any artificial light while sleeping? Exposure to artificial light at night could be a risk factor for obesity and weight gain, according...Written By: Tiffany DazetMAY 15, 2019Cannabis Sciences
MAY 15, 2019According to the Centers for Disease Control, a third of adults report that they get less than the recommended amount of sleep. It is estimated that around...Written By: Amy LoriauxAPR 29, 2019Health & Medicine
APR 29, 2019Teeth grinding is a serious problem that haunts many of us in our sleep, and while it might seem apparent, it can take a serious toll on your health. To ma...Written By: Anthony BouchardAPR 28, 2019Cell & Molecular Biology
APR 28, 2019It seems that while what we eat is very important to our health, when we have our meals has an impact on our bodies as well....Written By: Carmen Leitch
SEP 02, 2019
Genetics & Genomics
SEP 02, 2019
Typically, people need between seven and eight hours of sleep per night to function properly. In fact, reducing sleep by just one or two hours for a ...
Written By:
Annie Lennon
JUN 11, 2019
Health & Medicine
JUN 11, 2019
Are you exposed to any artificial light while sleeping? Exposure to artificial light at night could be a risk factor for obesity and weight gain, according...
Written By:
Tiffany Dazet
MAY 15, 2019
Cannabis Sciences
MAY 15, 2019
According to the Centers for Disease Control, a third of adults report that they get less than the recommended amount of sleep. It is estimated that around...
Written By:
Amy Loriaux
APR 29, 2019
Health & Medicine
APR 29, 2019
Teeth grinding is a serious problem that haunts many of us in our sleep, and while it might seem apparent, it can take a serious toll on your health. To ma...
Written By:
Anthony Bouchard
APR 28, 2019
Cell & Molecular Biology
APR 28, 2019
It seems that while what we eat is very important to our health, when we have our meals has an impact on our bodies as well....
Written By:
Carmen Leitch
MAR 17, 2019
Microbiology
MAR 17, 2019
Some astronauts have lived onboard the International Space Station for hundreds of days. Researchers are learning more about the things that can happen in that time....
Written By:
Carmen Leitch
FEB 24, 2019
Earth & The Environment
FEB 24, 2019
Do you suffer from insomnia? Well, you're not alone - one in four Americans develop insomnia every year, and while it doesn't usually result from a...
Written By:
Kathryn DeMuth Sullivan
FEB 16, 2019
Health & Medicine
FEB 16, 2019
Myalgic encephalomyelitis, or chronic fatigue syndrome (ME/CFS), is a disabling condition that affects every aspect of a person’s life. In the U. S.,...
Written By:
Dena Aruta
FEB 12, 2019
Cardiology
FEB 12, 2019
Research has shown that stress is not good for the heart. To combat stress, some people participate in meditation practices. A number of studies, across bo...
Written By:
Abbie Arce
- Protein Expression
- Genetics
- Cancer Metabolism
- Neurobiology
- Engineering
- Medicine
- Obesity
- General Medicine
- Genomics
- Molecular Biology
- Neuroscience
- Biology
- Internal Medicine
- ALS
- Animal Research
- Clinical Genetics
- Neuron
- Brain
- Protein
- Neurology
- Human Biology
- Cell Biology
- Gene Expression
- Public Health
- Nerve
- Animal Models
- Anxiety
- Diet
- Neurons
- Physiology
- Depression
- Natural Medicine
- Physical Testing
- Animal Behavior
- Diabetes
- Stress
- Cancer Research
- Blood
- Cell Therapy
- Metabolism
- Psychiatry
- Genetic Engineering
- Inflammatory Disease
- Psychology
- Clinical Research
- Medical Genetics
- Animal Sciences
- Diagnostics
- Neurochemistry
- Tumor
- Animal Production
- Clinical Diagnostics
- Gene Therapy
- Imaging
- Astrocytes
- Vision
- Protein Engineering
- Computational Biology
- Mammal
- Biomedical Research
- Therapeutics
- Aging
- Exercise
- Cardiac Markers
- Systems Biology
- Alzheimer's Disease
- Cardiovascular Medicine
- CAR T-Cells
- Neurodegeneration
- Cardiology
- Epidemiology
- Immunology
- Food Science
- Pre-Clinical
- Small Molecule
- Dementia
- EEG
- Adipose Tissue
- Cannabinoid Research
- Coagulation
- Quality Control
- Brain Initiative
- Pediatrics
- Physics
- Social Sciences
- Addiction
- Biologics
- Fitness
- Memory Loss
- Mental Illness
- Glucose
- Anatomy
- Pathology
- Biological Organisms
- Neurotransmitters
- Prescription Drugs
- PTSD
- Stroke
- Vaccinations
- Environmental Health
- Biomarkers
- Cancer Therapeutics
- Cannabis Sciences
- Endocrinology
- Molecular Diagnostics
- Transduction
- Fertility
- Rapid Point of Care Testing
- Neurophysiology
- Genetic Testing
- Antibodies
- Cell Signaling/Transduction
- Plant Sciences
- Clinical Trials
- Cerebral Cortex
- Traumatic Brain Injury
- Virus
- Neurodevelopmental Disorders
- Cerebellum
- Lipids
- Neuroimaging
- Space Science
- Population Model
- Lab Animals
- Microbiology
- Microbiome
- Nutrition
- AIDS
- Clinical Neurophysiology
- Pathobiology
- Pharmaceuticals
- Pharmaceutical
- Physical Education
- Translational Medicine
- Vitamin D
- Substances
- Concussion
- Hippocampus
- Cell Death
- Cell Line Development
- Adrenergic Receptors
- Medical Device
- Stem Cells
- Neural Engineering
- Sequencing
- Lymphocytes
- Environmental Chemistry
- Fungi
- Fluorescence
- Serotonin
- Astrobiology
- Industrial Microbiology
- Earth Science
