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Related Concept Videos

Insomnia01:27

Insomnia

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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.
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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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Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
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Insufficient Sleep and Sleep Deprivation01:13

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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.
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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
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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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Changes in subcortical shape and cognitive function in patients with chronic insomnia.

Dae Lim Koo1, Jeong-Hyeon Shin2, Jae-Sung Lim3

  • 1Department of Neurology, Seoul National University Boramae Hospital, Seoul, South Korea.

Sleep Medicine
|June 17, 2017
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Summary
This summary is machine-generated.

Chronic insomnia is linked to brain structure changes. Subcortical atrophy in areas like the hippocampus and putamen correlates with poor sleep quality and cognitive deficits.

Keywords:
Chronic insomniaCognitive functionShape analysis

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Area of Science:

  • Neuroimaging
  • Cognitive Neuroscience
  • Sleep Medicine

Background:

  • Chronic insomnia affects millions globally, impacting quality of life.
  • Subcortical brain structures play crucial roles in sleep regulation and cognitive processes.
  • Understanding the neurobiological underpinnings of insomnia is vital for developing targeted interventions.

Purpose of the Study:

  • To investigate morphological alterations in subcortical brain regions using surface-based analysis in individuals with chronic insomnia.
  • To establish correlations between localized shape changes in subcortical structures and cognitive performance.

Main Methods:

  • Surface-based morphometric analysis was employed to assess subcortical brain structures.
  • Shape changes were statistically correlated with clinical data, including sleep quality (Pittsburgh Sleep Quality Index) and arousal indices.
  • Neuropsychological assessments evaluated cognitive functions such as verbal fluency, executive function, and memory.

Main Results:

  • Hippocampal atrophy was significantly associated with poorer sleep quality and higher arousal indices.
  • Reduced volume in the putamen correlated with increased arousal.
  • Atrophic changes across multiple subcortical structures (hippocampus, amygdala, basal ganglia, thalamus) showed negative correlations with various cognitive functions, including verbal fluency, frontal function, and memory.

Conclusions:

  • Sleep quality and fragmentation are demonstrably linked to atrophic changes in the hippocampus and putamen in patients with chronic insomnia.
  • Global subcortical structural atrophy is associated with cognitive impairments, highlighting the widespread neurological impact of chronic insomnia.