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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:
Understanding Sleep01:11

Understanding Sleep

Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
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.
RBD is significantly associated with...
Insufficient Sleep and Sleep Deprivation01:13

Insufficient Sleep and Sleep Deprivation

Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
Sleep deprivation is a more severe form of sleep loss...
Management of Insomnia01:19

Management of Insomnia

The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...

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Related Experiment Video

Updated: May 18, 2026

Quantifying Infra-slow Dynamics of Spectral Power and Heart Rate in Sleeping Mice
10:56

Quantifying Infra-slow Dynamics of Spectral Power and Heart Rate in Sleeping Mice

Published on: August 2, 2017

A sound sleep.

Rudra Prosad Goswami1, Swati Mondal, Subrata Basu

  • 1Department of Medicine, Institute of Post Graduate Medical Education and Research, Kolkata, India.

Indian Journal of Critical Care Medicine : Peer-Reviewed, Official Publication of Indian Society of Critical Care Medicine
|September 19, 2012
PubMed
Summary

Acute benzodiazepine poisoning can be challenging to diagnose without a clear history. This case highlights unique MRI findings of globus pallidus T2 hyperintensity as a key diagnostic indicator.

Keywords:
BenzodiazepineIndiaMRIbilateral basal ganglia hyperintensitypoisoning

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Area of Science:

  • Neurology
  • Toxicology
  • Radiology

Background:

  • Benzodiazepine poisoning is common but diagnosis can be difficult without a history.
  • Clinical assessment, urine assays, and imaging are crucial for diagnosis.

Observation:

  • A case of acute benzodiazepine poisoning presented without a history of drug intake.
  • Key clinical signs included unarousable state and obstructive apnea.
  • Brain MRI revealed symmetrical isolated globus pallidus T2 hyperintensity.

Findings:

  • The MRI finding of isolated bilateral basal ganglia T2-weighted hyperintensity is reported.
  • This specific imaging finding is associated with acute benzodiazepine poisoning.

Implications:

  • This case expands the understanding of neuroimaging findings in benzodiazepine poisoning.
  • Highlights the importance of MRI in diagnosing poisoning when history is absent.
  • Suggests T2 hyperintensity in the globus pallidus as a potential diagnostic marker.