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Pain serves as a critical warning signal that alerts the body to potential or actual harm. When mechanical pressure on the skin is intense, such as from a sharp pinch, the sensation transitions from touch to pain. Similarly, extreme temperatures, like a hot pot handle, convert the sensation of heat into pain. Pain can also result from overstimulation of other senses, such as blinding light, loud noise, or the intense heat from habañero peppers. This ability to sense pain is essential for...
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In Vivo Imaging of Cerebrospinal Fluid Transport through the Intact Mouse Skull using Fluorescence Macroscopy
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The Glymphatic System and Pain.

Nanna Goldman1, Lauren M Hablitz1, Yuki Mori2

  • 1Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, USA.

Medical Acupuncture
|December 28, 2020
PubMed
Summary

The brain's glymphatic system clears waste, influenced by sleep and norepinephrine. Mind-body therapies may reduce norepinephrine, enhancing glymphatic function and easing chronic pain.

Keywords:
acupuncturechronic neuropathic painglymphaticneuroinflammationnorepinephrine

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Area of Science:

  • Neuroscience
  • Sleep Science
  • Pain Research

Background:

  • The glymphatic system facilitates brain waste clearance via cerebrospinal and interstitial fluid movement.
  • Glymphatic function is modulated by sleep and norepinephrine levels, with higher norepinephrine during wakefulness inhibiting fluid transport.
  • Chronic neuropathic pain is often associated with sleep disruption and norepinephrine's role in pain chronification.

Purpose of the Study:

  • To explore the intricate connections between glymphatic clearance, sleep, and chronic neuropathic pain.
  • To propose a hypothesis linking mind-body interventions to improved glymphatic function and pain relief.

Main Methods:

  • This perspective synthesizes existing research on the glymphatic system, sleep, norepinephrine, and pain.
  • It outlines a theoretical framework for how mind-body interventions might impact these physiological processes.

Main Results:

  • Increased norepinephrine during wakefulness inhibits glymphatic fluid exchange.
  • Norepinephrine is crucial for the transition from acute to chronic pain states.
  • Sleep disruption is a common feature in chronic neuropathic pain patients.

Conclusions:

  • Mind-body interventions, such as acupuncture, may reduce norepinephrine levels.
  • Reducing norepinephrine could enhance glymphatic system function.
  • This mechanism offers a potential non-pharmaceutical pathway for alleviating chronic neuropathic pain.