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Related Concept Videos

REM Sleep Behavior Disorder01:15

REM Sleep Behavior Disorder

1.1K
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

Sleep-Wake Cycles

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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
NREM sleep comprises four progressive stages that seamlessly merge:
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Narcolepsy01:07

Narcolepsy

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Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.
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Neural Regulation01:37

Neural Regulation

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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Parkinson's Disease: Overview01:15

Parkinson's Disease: Overview

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Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
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Sleepwalking and Sleep Talking01:17

Sleepwalking and Sleep Talking

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Somnambulism, commonly known as sleepwalking, involves individuals engaging in activities ranging from simple walking to more complex behaviors such as driving. Sleepwalking typically occurs during the slow-wave sleep stages 3 and 4 early in the night when the person is not dreaming, contradicting the myth that sleepwalkers are acting out their dreams.
Factors that increase the likelihood of sleepwalking include sleep deprivation and alcohol consumption. Contrary to common beliefs, it is safe...
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Related Experiment Video

Updated: Dec 29, 2025

Technique for Intranasal Administration of α-Synuclein Aggregates
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[REM Sleep Behavior Disorder and α-synucleinopathy].

Tomoyuki Miyamoto1, Kyoko Numahata, Hideaki Ishido

  • 1Department of Neurology, Dokkyo Medical University Saitama Medical Center.

Brain and Nerve = Shinkei Kenkyu No Shinpo
|February 10, 2020
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Summary

Accurate diagnosis of REM sleep behavior disorder (RBD) is crucial for early intervention as it can progress to neurodegenerative diseases. Developing sensitive markers for alpha-synucleinopathy is key for clinical trials.

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Area of Science:

  • Neuroscience
  • Neurology

Background:

  • REM sleep behavior disorder (RBD) is a significant predictor of future neurodegenerative conditions.
  • RBD can progress to Parkinson's disease, Lewy body dementia, or multiple system atrophy within two decades.

Purpose of the Study:

  • To highlight the importance of accurate RBD diagnosis for early intervention.
  • To emphasize the need for sensitive markers to evaluate high-risk groups and therapeutic efficacy in clinical trials for alpha-synucleinopathy.

Main Methods:

  • Focus on the development of clinical protocols for early diagnosis of alpha-synucleinopathy.
  • Outline the progression towards conducting clinical trials for candidate therapies.

Main Results:

  • Accurate diagnosis of RBD is essential for timely intervention.
  • Development of sensitive markers is critical for successful clinical trials.

Conclusions:

  • Early diagnosis of RBD is vital for managing potential progression to Parkinson's disease and related disorders.
  • Future clinical trials will focus on candidate therapies for alpha-synucleinopathy, requiring validated diagnostic markers.