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Related Concept Videos

REM Sleep Behavior Disorder01:15

REM Sleep Behavior Disorder

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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.
RBD is significantly associated with...
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Sleep-Wake Cycles01:24

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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).
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NREM sleep comprises four progressive stages that seamlessly merge:
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Updated: Nov 6, 2025

A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice
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Sleep disturbance and memory dysfunction in early multiple sclerosis.

James F Sumowski1, Sam Horng1, Rachel Brandstadter2

  • 1Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, New York, USA.

Annals of Clinical and Translational Neurology
|May 5, 2021
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Summary
This summary is machine-generated.

Sleep disturbance significantly worsens memory in early multiple sclerosis (MS) patients. Addressing sleep issues may improve memory function in individuals with MS.

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Area of Science:

  • Neuroscience
  • Sleep Science
  • Clinical Neurology

Background:

  • Sleep-dependent memory processing is crucial for cognitive function in humans.
  • Sleep disturbances and memory dysfunction are prevalent in multiple sclerosis (MS).
  • The specific impact of sleep disturbance on memory in early MS remains under-investigated.

Purpose of the Study:

  • To investigate the association between subjective sleep disturbance and memory performance in early MS.
  • To determine if this association persists independently of potential confounding factors.

Main Methods:

  • A cohort of 185 early MS patients and 50 healthy controls were assessed.
  • Memory and cognitive efficiency were evaluated using standardized tests.
  • Sleep disturbance was defined using the Insomnia Severity Index (score ≥ 10); analyses controlled for mood, fatigue, disability, and brain imaging metrics.

Main Results:

  • 40% of MS patients reported sleep disturbance.
  • Patients with sleep disturbance exhibited significantly worse memory composite scores compared to those without (z = -0.617 vs. z = -0.171).
  • Cognitive efficiency did not differ between patient groups; memory deficits were evident in MS patients with sleep disturbance relative to controls.

Conclusions:

  • Subjective sleep disturbance is a significant contributor to memory dysfunction in early MS.
  • These findings highlight the importance of assessing and managing sleep disturbances in MS patients to potentially mitigate memory impairments.
  • Further research into the mechanisms and interventions for sleep-related memory issues in MS is warranted.