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Related Concept Videos

Sleep-Wake Cycles01:24

Sleep-Wake Cycles

Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and  rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
Nightmares and Night Terrors01:18

Nightmares and Night Terrors

Nightmares and night terrors represent two distinct types of sleep disturbances that differ in timing, characteristics, and the sleeper's recall of the event. Nightmares are vivid, disturbing dreams that usually awaken the sleeper from REM sleep, a stage of sleep where brain activity is high, and dreams are most frequent. Upon awakening, individuals often have detailed recollections of their nightmares, which can include themes of threats to survival, security, or self-esteem.
Nightmares often...
Sleep Apnea01:21

Sleep Apnea

Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
The condition is more prevalent among...
Insomnia01:27

Insomnia

Insomnia is a prevalent sleep disorder characterized by difficulty falling asleep, frequent awakenings during the night, and waking up too early without being able to return to sleep. People with insomnia often experience these disruptions at least three nights a week for at least one month. Chronic insomnia, which lasts for at least three months, can lead to increased anxiety, which in turn can worsen sleep difficulties, creating a cycle of sleeplessness and stress.
Multiple factors contribute...
Stages of Sleep01:22

Stages of Sleep

Sleep progresses through distinct stages, each characterized by specific brain wave patterns and physiological responses ranging from wakefulness to stages of non-rapid eye movement, known as non-REM, to rapid eye movement, referred to as REM. Understanding these stages helps in recognizing how sleep supports various bodily and cognitive functions.
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
Narcolepsy01:07

Narcolepsy

Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.

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Related Experiment Video

Updated: Jun 30, 2026

High-Throughput Small Molecule Drug Screening For Age-Related Sleep Disorders Using Drosophila melanogaster
05:59

High-Throughput Small Molecule Drug Screening For Age-Related Sleep Disorders Using Drosophila melanogaster

Published on: October 20, 2023

Sleep in the elderly: normal variations and common sleep disorders.

Sonia Ancoli-Israel1, Liat Ayalon, Carl Salzman

  • 1Department of Psychiatry, University of California San Diego, La Jolla, CA 92093-0603, USA. sancoliisrael@ucsd.edu

Harvard Review of Psychiatry
|September 23, 2008
PubMed
Summary

Sleep difficulties in older adults are common but not a normal part of aging. Recognizing and treating various causes, including medical conditions and medications, is crucial for improving sleep quality and overall health.

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Multi-Modal Home Sleep Monitoring in Older Adults
07:40

Multi-Modal Home Sleep Monitoring in Older Adults

Published on: January 26, 2019

Related Experiment Videos

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High-Throughput Small Molecule Drug Screening For Age-Related Sleep Disorders Using Drosophila melanogaster
05:59

High-Throughput Small Molecule Drug Screening For Age-Related Sleep Disorders Using Drosophila melanogaster

Published on: October 20, 2023

Multi-Modal Home Sleep Monitoring in Older Adults
07:40

Multi-Modal Home Sleep Monitoring in Older Adults

Published on: January 26, 2019

Area of Science:

  • Geriatric Medicine
  • Sleep Science
  • Public Health

Background:

  • Sleep disturbances are prevalent complaints among older adults.
  • Insufficient sleep is linked to increased fall risk, cognitive decline, and reduced quality of life.
  • Sleep issues in seniors are often associated with comorbidities, medications, circadian rhythm changes, or other sleep disorders.

Purpose of the Study:

  • To highlight the importance of recognizing diverse causes of sleep disturbances in the geriatric population.
  • To emphasize that sleep difficulties are not an inevitable aspect of aging.
  • To guide healthcare professionals in initiating appropriate interventions for sleep problems in older adults.

Main Methods:

  • Review of common sleep complaints in older adults.
  • Analysis of contributing factors such as medical conditions, psychiatric comorbidities, and medications.
  • Discussion of nonpharmacological treatment strategies for geriatric sleep disorders.

Main Results:

  • Sleep complaints in older adults stem from various underlying issues, not just aging itself.
  • Identifying the specific cause is key to effective management.
  • Nonpharmacological interventions offer viable treatment options.

Conclusions:

  • Healthcare providers must be adept at diagnosing the root causes of sleep disturbances in seniors.
  • Targeted treatment, starting with nonpharmacological approaches, can significantly improve sleep and health outcomes.
  • Addressing sleep problems is essential for enhancing the quality of life for older adults.