The glymphatic system: how the brain washes itself during sleep
Only discovered in 2012, the brain's waste-clearance network flushes out toxins — including proteins tied to Alzheimer's — most actively during deep sleep. Explore this newly understood plumbing and what it means for why we sleep.
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Brain cell gaps expand by sixty percent during deep sleep to allow fluid to wash away metabolic waste.
The glymphatic system uses perivascular spaces as tunnels to pump cerebrospinal fluid through brain tissue.
Norepinephrine levels must drop for the brain to trigger cellular shrinkage and initiate the nightly cleaning process.
Side-sleeping may be the most efficient physical position for clearing debris and toxins from the brain.
Sleep deprivation prevents perivascular drainage channels from opening, leading to the accumulation of amyloid-beta and tau proteins.
Arterial pulsations act as a mechanical engine to drive the flow of fluid through the brain's plumbing.
- 01Intro1 min
- 02The Discovery of the Hidden Plumbing2 min
- 03The Mechanics of the Nightly Wash3 min
- 04The Alzheimer's Connection3 min
- 05Optimizing the Brain Drain2 min
- 06Outro1 min
- The glymphatic system clears amyloid beta and tau from brain to plasma in humans | Nature Communications
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- Why is sleep so important? Your brain depends on it
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- Brain Drain - PMC
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- The glymphatic system in CNS health and disease: past, present and future - PMC
- A Paravascular Pathway Facilitates CSF Flow Through the Brain Parenchyma and the Clearance of Interstitial Solutes, Including Amyloid β - PMC
- The Glymphatic System: A Novel Component of Fundamental Neurobiology - PMC
- The Glymphatic Pathway: Waste Removal from the CNS via Cerebrospinal Fluid Transport - PMC
- Norepinephrine-mediated slow vasomotion drives glymphatic clearance during sleep: Cell
- The Glymphatic System in Humans: Investigations With Magnetic Resonance Imaging - PMC
- The glymphatic system clears amyloid beta and tau from brain to plasma in humans
- Glymphatic and lymphatic communication with systemic responses during physiological and pathological conditions in the central nervous system | Communications Biology
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