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Related Concept Videos

Sleepwalking and Sleep Talking01:17

Sleepwalking and Sleep Talking

Somnambulism, commonly known as sleepwalking, involves individuals engaging in activities ranging from simple walking to more complex behaviors such as driving. Sleepwalking typically occurs during the slow-wave sleep stages 3 and 4 early in the night when the person is not dreaming, contradicting the myth that sleepwalkers are acting out their dreams.
Factors that increase the likelihood of sleepwalking include sleep deprivation and alcohol consumption. Contrary to common beliefs, it is safe...
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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.
Sleep-Wake Cycles01:24

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NREM Sleep
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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.
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REM Sleep Behavior Disorder01:15

REM Sleep Behavior Disorder

REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
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Subconsciousness and No Awareness01:15

Subconsciousness and No Awareness

The concept of subconscious awareness refers to the processing of information below the level of conscious thought, which significantly influences both behaviors and decisions. It is also known as waking subconscious awareness. This complex level of cognition operates without the direct awareness of the individual, facilitating rapid and simultaneous handling of multiple information streams.
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Updated: Jun 24, 2026

How to Obtain Reliable Visual Event-related Potentials in Newborns
07:39

How to Obtain Reliable Visual Event-related Potentials in Newborns

Published on: October 24, 2019

Sudden infant death while awake.

Henry F Krous1, Amy E Chadwick, Elisabeth Haas

  • 1Department of Pathology, Rady Children's Hospital and Health Center, 3020 Children's Way, MC5007, San Diego, CA 92123, USA. hkrous@rchsd.org

Forensic Science, Medicine, and Pathology
|March 18, 2009
PubMed
Summary
This summary is machine-generated.

Sudden infant death syndrome (SIDS) is often linked to sleep, but this study examines five infants who died suddenly while awake. Further research is crucial to understand these unique infant mortality cases.

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Area of Science:

  • Pediatrics
  • Pathology
  • Epidemiology

Background:

  • Sudden infant death syndrome (SIDS) is typically associated with sleep-related events.
  • Limited research exists on infant deaths occurring during wakefulness.

Observation:

  • This study reports on five infants who were awake during their sudden, catastrophic deterioration and death.
  • The demographic and pathological characteristics of these cases resemble those of SIDS.

Findings:

  • Potential pathophysiological mechanisms include altered responses to hypotension, bradycardia, and apnea.
  • Aspiration and cerebellar/vestibular system involvement are hypothesized as contributing factors.

Implications:

  • Thorough postmortem investigations, including genetic testing, are vital for understanding these deaths.
  • Distinguishing between awake and sleep states prior to death is critical for future research and understanding infant mortality patterns.