Scientists Make Waves In Awake Brains

By Author: Anton Bluman
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Controlling spinal fluid might help treat neurological diseases.

Waves of cerebrospinal fluid that normally wash over brains during sleep can be made to pulse in the brains of people who are wide awake, a new study finds.

Previous research has suggested that the clear fluid may flush out harmful waste, such as the sticky proteins that accumulate in Alzheimer’s disease (SN: 7/21/18, p. 22). So being able to control the fluid flow in the brain might have implications for treating certain brain disorders. I think this [finding] will help with many neurological disorders,” says Jonathan Kipnis, a neuroscientist at Washington University in St. Louis who was not involved in the work. “Think of Formula One. You can have the best car and driver, but without a great maintenance crew, that driver will not win the race:’ Spinal fluid flow in the brain is a major part of that maintenance crew, Kipnis says. But he and other researchers, including the study’s authors, caution that any potential therapeutic applications are still far off.

I think this [finding] will help with many neurological disorders,” says ...
... Jonathan Kipnis, a neuroscientist at Washington University in St. Louis who was not involved in the work. “Think of Formula One. You can have the best car and driver, but without a great maintenance crew, that driver will not win the race:’ Spinal fluid flow in the brain is a major part of that maintenance crew, Kipnis says. But he and other researchers, including the study’s authors, caution that any potential therapeutic applications are still far off. In 2019, neuroscientist Laura Lewis of Boston University and colleagues reported that strong waves of cerebrospinal fluid wash through our brains while we slumber, suggesting that sleep may give the brain a deep clean (SN: 11/23/19, p.11). The slow neural oscillations that characterize deep, non-REM sleep occur in lockstep with the waves of spinal fluid, the team showed. These flows are far larger than the rhythmic influences that breathing and heartbeat have on spinal fluid.

As brain activity during sleep causes blood to flow through the brain, spinal fluid flows in behind the blood. Such fluid infusions clear out toxic proteins and maintain constant pressure in the skull, experiments in mice have shown.

In the new study, “the first question we wanted to answer is, can you manipulate [blood flow] enough to also drive [fluid] flow when someone’s awake?” says Stephanie Williams, a neuroscientist also at Boston University.

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