Howl: Nightmare or REM Sleep Behavior Disorder?

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Updated: Aug 7, 2025

A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice
06:23

A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice

Published on: September 22, 2020

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Maria Jose Abenza-Abildúa1, Vanesa Lores-Gutiérrez1, Guadalupe Gutiérrez-Cueto1

  • 1Neurology Department (MJA-A), Infanta Sofía University Hospital; Pneumology Department (VL-G, GG-C), Infanta Sofía University Hospital; Psychiatry Department (ES-G), Infanta Sofía University Hospital; and Neurosurgery Department (CP-L), La Paz University Hospital, Madrid, Spain.

Neurology. Clinical Practice
|March 9, 2023
PubMed
Abstract

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REM Sleep Behavior Disorder

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Nightmares and Night Terrors

Nightmares and night terrors represent two distinct types of sleep disturbances that differ in timing, characteristics, and the sleeper's recall of the event. Nightmares are vivid, disturbing dreams that usually awaken the sleeper from REM sleep, a stage of sleep where brain activity is high, and dreams are most frequent. Upon awakening, individuals often have detailed recollections of their nightmares, which can include themes of threats to survival, security, or self-esteem.
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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).
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