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Neuronal dynamics direct cerebrospinal fluid perfusion and brain clearance
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Journal Article
Neuronal dynamics direct cerebrospinal fluid perfusion and brain clearance
2024
Overview
The accumulation of metabolic waste is a leading cause of numerous neurological disorders, yet we still have only limited knowledge of how the brain performs self-cleansing. Here we demonstrate that neural networks synchronize individual action potentials to create large-amplitude, rhythmic and self-perpetuating ionic waves in the interstitial fluid of the brain. These waves are a plausible mechanism to explain the correlated potentiation of the glymphatic flow
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,
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through the brain parenchyma. Chemogenetic flattening of these high-energy ionic waves largely impeded cerebrospinal fluid infiltration into and clearance of molecules from the brain parenchyma. Notably, synthesized waves generated through transcranial optogenetic stimulation substantially potentiated cerebrospinal fluid-to-interstitial fluid perfusion. Our study demonstrates that neurons serve as master organizers for brain clearance. This fundamental principle introduces a new theoretical framework for the functioning of macroscopic brain waves.
Rhythmic neural activity drives cerebrospinal fluid perfusion through brain parenchyma to enhance brain cleansing.
Publisher
Nature Publishing Group UK,Nature Publishing Group
