Breakdown in REM sleep circuitry underlies REM sleep behavior disorder.
John Peever1, Pierre-Hervé Luppi2, Jacques Montplaisir3
1Systems Neurobiology Laboratory, Departments of Cell and Systems Biology and Physiology, University of Toronto, Ontario, Canada.
Trends in Neurosciences
|March 29, 2014
Summary
REM sleep behavior disorder (RBD) involves loss of muscle paralysis during dreams, leading to injuries. This condition may signal early neurodegeneration, potentially targeting REM sleep circuits and preceding Parkinson's disease.
Area of Science:
- Neuroscience
- Sleep Medicine
- Neurology
Background:
- Rapid eye movement (REM) sleep normally involves muscle atonia (paralysis).
- REM sleep behavior disorder (RBD) is characterized by the loss of this muscle atonia.
- RBD is a significant risk factor, preceding 80% of synucleinopathy cases like Parkinson's disease.
Purpose of the Study:
- To investigate the neurobiological underpinnings of REM sleep behavior disorder.
- To explore the connection between RBD and the development of synucleinopathies.
- To identify potential therapeutic targets for RBD and related neurodegenerative disorders.
Main Methods:
- Clinical observation of RBD patients.
- Basic neuroscience research into REM sleep circuitry.
- Analysis of the link between REM sleep dysfunction and neurodegeneration.
Main Results:
- Evidence suggests RBD arises from a breakdown in the neural network responsible for REM sleep atonia.
- This breakdown indicates that neurodegenerative processes may initially affect REM sleep regulatory circuits.
- A strong association exists between RBD and the subsequent development of Parkinson's disease and other synucleinopathies.
Conclusions:
- The loss of REM sleep atonia in RBD is a critical indicator of underlying neurological dysfunction.
- Understanding the breakdown of REM sleep circuits offers new pathways for RBD treatment.
- RBD serves as a potential early marker for synucleinopathies, aiding in understanding neurodegenerative disease progression.
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