The quality and quantity of sleep an individual gets, in relation to physical health and wellbeing.
Sleep stages: Different stages of sleep and their effects on the body and mind.
Sleep cycles: The regular pattern of transitioning between the various sleep stages.
Circadian rhythm: The natural internal clock that regulates the sleep-wake cycle.
Sleep deprivation: The effects of not getting enough sleep on physical and mental health.
Sleep quality: Measures of the depth and restfulness of sleep.
Insomnia: A common sleep disorder characterized by trouble falling or staying asleep.
Sleep disorders: Other types of sleep disorders, such as sleep apnea, narcolepsy, and restless legs syndrome.
Sleep hygiene: Practices and habits that help promote good sleep, such as a consistent bedtime and sleep environment.
Sleep tracking: The use of technology to monitor and track sleep patterns.
Dreams: The psychology and meaning of dreams during sleep.
Melatonin: The role of the hormone melatonin in regulating sleep.
Napping: The benefits and drawbacks of taking daytime naps.
Restless sleep: The causes and effects of restless sleep, including tossing and turning or waking frequently during the night.
Sleep supplements: Natural and synthetic substances that can help improve sleep, such as melatonin or valerian root.
Sleep aids: Prescription or over-the-counter medications that can help promote sleep or treat sleep disorders.
Sleep and exercise: The relationship between physical activity and sleep quality.
Sleep and diet: The effects of diet and nutrition on sleep quality, including the best and worst foods for sleep.
Sleeping positions: How different sleeping positions affect sleep quality and physical health.
Sleep and mental health: The connections between sleep and mental health, including depression, anxiety, and stress.
Sleep environment: Creating a sleep-friendly environment, including temperature, noise, and lighting.
REM sleep: Rapid Eye Movement sleep, also known as deep sleep, characterized by rapid eye movements, dreaming, and bodily paralysis to prevent acting out dreams. It plays a crucial role in memory consolidation, emotional regulation, and learning.
NREM sleep: Non-Rapid Eye Movement sleep, also known as light sleep, is divided into three stages, N1, N2, and N3, characterized by slower brain waves, muscle relaxation, and lower body temperature. It is essential for physical restoration, growth and repair, and memory retention.
Sleep apnea: A sleeping disorder characterized by brief interruptions in breathing that can lead to daytime fatigue, moodiness, and a decrease in physical health.
Insomnia: A sleep disorder characterized by difficulty initiating or maintaining sleep, resulting in feeling tired or fatigued, mood disturbances, and decreased performance.
Narcolepsy: A sleep disorder characterized by sudden and unpredictable attacks of sleep that can lead to loss of muscle control, vivid hallucinations, and sleep paralysis.
Sleepwalking: A sleep disorder characterized by unexplained walking or other activities during sleep, often resulting in no memory of the episode.
Talking in sleep: A condition characterized by the act of speaking while asleep, which can be associated with vivid dreams or sleep disorders.
Nightmares: A type of dream that can be distressing, terrifying, and causes a person to awaken, leading to difficulty returning to sleep.
Night terrors: A type of sleep disorder characterized by sudden awakenings accompanied by screaming, sweating, and heightened anxiety.
Restless leg syndrome: A sleep disorder characterized by uncontrollable urges to move legs during sleep, resulting in discomfort, irritation, and sleep disruption.