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Related Concept Videos

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...
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...
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Sedatives and Hypnotics Drugs: Miscellaneous Agents

Sedatives and hypnotics encompass a wide range of substances, each with its unique mechanism of action, uses, and potential adverse effects.
Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
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Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder
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Published on: April 26, 2024

Neuroimaging studies in insomnia.

Kai Spiegelhalder1, Wolfram Regen, Chiara Baglioni

  • 1Department of Psychiatry and Psychotherapy, University of Freiburg Medical Center, Hauptstraße 5, 79104, Freiburg, Germany, Kai.Spiegelhalder@uniklinik-freiburg.de.

Current Psychiatry Reports
|September 24, 2013
PubMed
Summary
This summary is machine-generated.

Chronic insomnia involves overactive brain regions affecting sleep and daytime function. Neuroimaging reveals altered brain activity, neurochemistry, and structure in individuals with insomnia.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Medical Imaging

Background:

  • Chronic insomnia is a widespread psychiatric disorder with significant health implications.
  • The underlying pathophysiology of chronic insomnia remains poorly understood.
  • Neuroimaging studies offer insights into the brain mechanisms of insomnia.

Purpose of the Study:

  • To review and synthesize current neuroimaging findings in chronic insomnia.
  • To elucidate the neural correlates of sleep disturbances and daytime impairments in insomnia.

Main Methods:

  • Systematic review of neuroimaging literature on chronic insomnia.
  • Analysis of functional magnetic resonance imaging (fMRI) and positron emission tomography (PET) studies.
  • Examination of structural MRI and magnetic resonance spectroscopy (MRS) findings.

Main Results:

  • Insomnia is associated with corticolimbic overactivity during sleep and wakefulness.
  • Daytime task performance in insomnia correlates with hypoactivation in task-related brain areas.
  • Evidence suggests reduced cortical GABA levels in insomnia patients.
  • Potential alterations in brain morphometry are observed in the frontal cortex, hippocampus, and anterior cingulate cortex.

Conclusions:

  • Neuroimaging data suggest a complex pattern of brain dysfunction in chronic insomnia.
  • Future research requires larger sample sizes and longitudinal designs for robust findings.
  • Understanding the neurobiology of insomnia is crucial for developing effective treatments.