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   What causes problems in defining sleep?

   • Problems in defining sleep may arise from the effects of artificial manipulation. For example, some of the EEG patterns commonly used as signs of sleep can be induced in an otherwise waking organism by the administration of certain drugs. How much sleep does a person need?

   Sleep | Definition, Patterns, Deprivation, & Theories | Britannica

   www.britannica.com/science/sleep

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   How does lack of sleep affect your health?

   • Research has shown that your cardiovascular health, blood pressure and even your immune system can be affected by lack of sleep. Not to mention, lack of sleep also ages you and can affect your weight and mood. If you're dealing with sleep deprivation or are already feeling the side effects, it's helpful to know the stages first.

   The 6 Stages of Sleep Deprivation and How to Spot Them

   www.cnet.com/health/sleep/the-6-stages-of-sleep-deprivation-and-how-to-spot-them/

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   Can depression cause sleep problems?

   • Depression can cause fragmented sleep, which may lead to increased levels of sleepiness and fatigue during waking hours. Those who are experiencing difficult depression-related symptoms may feel the need to sleep more than usual, but most adults should aim to get at least seven hours of sleep per day. Can Depression Lead to Sleep Disorders?

   Depression and Sleep - Sleep Foundation

   www.sleepfoundation.org/mental-health/depression-and-sleep

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2. www.cnet.com › health › sleepThe 6 Stages of Sleep Deprivation and How to Spot Them

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   1 day ago · Stages 5 and 6. These stages are the most dangerous because after five days of sleep deprivation, and if you've been hallucinating, you may also experience delusions and disordered thinking. In ...

3. www.sleepfoundation.org › mental-health › depressionDepression and Sleep - Sleep Foundation

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   3 days ago · Key Takeaways. Sleep and depression are closely linked, and lack of sleep can worsen depression. Symptoms of depression can include troubling thoughts, irritable mood, difficulty concentrating, and a lack of energy. Treating sleep problems can help alleviate depressive symptoms.

   • Video Duration: 7 min

4. www.sleepfoundation.org › how-sleep-works › how-muchHow Much Sleep Do You Need? | Sleep Foundation

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   4 days ago · Updated January 3, 2024. Eric Suni Staff Writer. Dr. Abhinav Singh Sleep Medicine Physician. Fact-Checked. Up-to-Date. Key Takeaways. Most healthy adults need at least seven hours of sleep each night. Infants, young children, and teenagers should get more sleep to support growth and development.

   • Video Duration: 4 min

5. www.tomsguide.com › wellness › mattressesCan't sleep? This is why your mind races when you go to bed ...

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   5 days ago · Here, sleep expert Dr. Kansagra explains what causes your mind to race, why it disrupts your sleep, and some steps to take to help with the problem. Why does your mind race at night?

6. www.medscape.org › viewarticle › 513572Consequences of Insomnia, Sleepiness, and Fatigue

   www.medscape.org › viewarticle › 513572

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   4 days ago · Whatever the cause, insomnia results in sleepiness, fatigue, and cognitive impairment. Excessive sleepiness has been linked to learning disabilities in children and cognitive and memory problems in adults.

7. taisetss.com › sleep-disorders-causes-symptoms-andSleep Disorders: Causes, Symptoms, and Treatment Options

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   4 days ago · Restless leg syndrome: A condition that causes an irresistible urge to move the legs, often accompanied by uncomfortable sensations. Circadian rhythm disorders: A group of disorders that disrupt the body’s natural sleep-wake cycle, leading to difficulty falling asleep or waking up at the right times. Causes of Sleep Disorders

8. www.britannica.com › science › sleepSleep | Definition, Patterns, Deprivation, & Theories ...

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   1 day ago · Sleep, a normal, reversible, recurrent state of reduced responsiveness to external stimulation that is accompanied by complex and predictable changes in physiology. Sleep contrasts with wakefulness, in which state there is an enhanced potential for sensitivity and an efficient responsiveness to external stimuli.