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Flickering Lights May Illuminate A Path To Alzheimer's Treatment (latimes.com)

Slashdot reader rpavlicek writes, "Research done by MIT late this year has shown that light signals can improve the brain's neuron gamma frequency which can reverse the effects of Alzheimer's disease (by removing brain plaque). Beneficial effects were found in both intercranial and optical stimuli." The Los Angeles Times reports: New research demonstrates that, in mice whose brains are under attack by Alzheimer's dementia, exposure to lights that flicker at a precise frequency can right the brain's faulty signaling and energize its immune cells to fight off the disease... In mice, these effects were limited to the visual cortex. In humans with Alzheimer's, that's not one of the brain regions that gets gummed up early or significantly by amyloid plaques. But the authors of the new research held out hope that the light therapy might induce gamma oscillations, or their immune-boosting effect, more broadly in human brains, or that some change in delivery of the light might extend its effects to brain regions, such as the hippocampus, that are profoundly affected by Alzheimer's.
A startup has already approached the FDA seeking clinical trials, and the L.A. Times adds that "Even if the new research does not yield a treatment for Alzheimer's, it is expected to deepen understanding of a key player in the disease -- the brain's dedicated immune system -- and point to ways it can be used to fight the disease."

30 comments

  1. It reminds me of those auto battery de-sulfators. by hey! · · Score: 1

    They hold out great promise, and it doesn't really hurt to try. But I wouldn't get my hopes up too much.

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  2. How Many? by tgetzoya · · Score: 2

    How many light are there? Does this mean Gul Madred was a futuristic neurologist?

    1. Re:How Many? by wbr1 · · Score: 1

      There are FOUR lights!

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      Silence is a state of mime.
    2. Re:How Many? by thoughtlover · · Score: 1

      There are FIVE lights...

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      No sig for you! Come back one year!
  3. Rave party... by WaterDamage · · Score: 1

    Time to feed the old timers some bath salts, ecstasy and bust out the xenon strobe lights and lasers and turns the lights out. LOL

    https://www.youtube.com/watch?...

  4. That's a worry! by NewtonsLaw · · Score: 5, Insightful

    So a precisely tuned flicker-frequency (40Hz in mice) does great things for brain function and maintenance -- so what deleterious effects do things like CRT monitors, mains-powered fluro/LED lighting etc have on our brains -- given that they're operating "out of sync" with our gamma waves?

    Could it be that the increase in dementia/Alzheimer's is related to our exposure to such off-frequency flickering on a very wide scale, thanks to modern technology?

    1. Re:That's a worry! by fuzzyfuzzyfungus · · Score: 2

      That does seem like a question at least worth throwing some mice at; but also one that may be aging itself out: I can't really remember the last time I actually used a CRT for any length of time; and the nasty iron ballast fluorescent drivers seem to be less common as well, though not as aggressively replaced if they aren't failing.

      At this point, most of the flicker has moved well away from mains-induced frequencies and up into PWM brightness control; that could also have an effect; but it's a much, much, higher frequency flicker unless somebody did a really obnoxious job.

    2. Re:That's a worry! by sjames · · Score: 4, Funny

      There are much better ways to dispose of old CRTs and they're much easier on the mice.

    3. Re:That's a worry! by guruevi · · Score: 1

      120Hz is the 3rd harmonic of 40 so most monitors these days should be fine? If you read the summary, it seems only the neurons responsible for the vision part of the brain were 'affected' in a somewhat positive way and that's typically not the area that Alzheimer's affects.

      For 'succesful' light therapy, my intuition would be that it would require skull removal/drilling (on mice at first) or perhaps a very high intensity light source would be needed to affect other parts of the brain.

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    4. Re:That's a worry! by SNRatio · · Score: 1

      Or it could be the mouse models of Alzheimers that are based on overexpression of amyloid precursor protein don't really reflect the pathology found in humans. http://www.alzforum.org/news/r...

    5. Re:That's a worry! by Anonymous Coward · · Score: 0

      Also, very, very few monitors and TVs are 120Hz.

    6. Re:That's a worry! by thoughtlover · · Score: 1

      Yet some flicker-rates can cause seizures to epileptics... Working on that premise, I do believe the MIC made a 'sick stick' by flickering lights at a certain frequency causing the viewer to vomit.

      https://www.technologyreview.c...

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  5. Might work, but be careful by 93+Escort+Wagon · · Score: 4, Funny

    Telling an elderly person to "move towards the light" might set off panic.

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  6. Re:It reminds me of those auto battery de-sulfator by Anonymous Coward · · Score: 0

    A cheap UPS from the junkyard will do the job well with it's small charge current designed for 7Ah batteries, add a timer and a small incandescent lamp as load and it will do charge/discharge automatically (you'll probably want to disable the buzzer).

    A small 30w 12v solar panel connected with a diode to the battery is an even nice alternative if you don't want to waste power on such attempts.

  7. Camp fire by Anonymous Coward · · Score: 0

    So to us troglodytes a flickering camp fire is beneficial. Got to go camping more.

  8. Someone sell these on ebay or etsy by Anonymous Coward · · Score: 0

    Please! Looks like they are fairly cheap to set up. I'm not inclined to build one, but would love to buy one for my elderly father, and would be happy to pay a 100% markup on components.

    1. Re:Someone sell these on ebay or etsy by lxs · · Score: 1

      You could always get a mind machine and tune it to 40Hz.

  9. Terrible News by Anonymous Coward · · Score: 1

    This will likely lead to the collapse of the Alzheimer's market, currently estimated at between $3 billion with a potential for $20 billion. There is no foreseeable way to profitably monetize therapies based on flashing lights.

    Your partners in good health,
    Giant Pharma

  10. Wait by Billly+Gates · · Score: 2

    I thought this was a post about the NVidia update process?

  11. Re:It reminds me of those auto battery de-sulfator by gtall · · Score: 1

    And this setup of your generates the light at the proper frequency and holds it there consistency without variation?

  12. Re:It reminds me of those auto battery de-sulfator by Anonymous Coward · · Score: 0

    1) What junkyard has UPSes in it?
    2) it's means it is.

  13. Likely Not To Work by ByTor-2112 · · Score: 3, Informative

    Unfortunately, a podcast I listened to recently, possibly Radiolab, also added that when moving Alzheimers therapies from mice to humans, there is a 99.6% failure rate.

  14. Reminds me... by drogers47 · · Score: 1

    I once complimented a woman for her Christmas brooch, which had tiny, multicolored, rapidly flickering LEDs on it. "I use it at work," she said, when she has to feed Alzheimer's patients. They fixate on the flickering brooch, she explained, which gives them the calming and the concentration needed to accept her spoonfeeding.

    I hope other caregivers experiment with LEDs.

  15. Is it not the other way around? by SuperKendall · · Score: 1

    I thought the brains only happened to sync at 40Hz, but they could sync at other speeds - so it's not like a faster/slower rate is "out of sync" with any natural rhythm, just that your brain cells may sync to whatever speed incoming light is regularly oscillating at, or perhaps particular frequencies.

    It could mean that all of the staring so many of us do at LCD monitors is actually *helpful*, a preventative measure for ALS! Or perhaps with some slight modulation it could be so. I'm already running my (LCD) monitor at 50Hz, I'd honestly be fine at 40...

    It also makes me wonder if particular refresh rates would be confusing to learning since the same effect takes place when learning new concepts.

    --
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    1. Re:Is it not the other way around? by fuzzyfuzzyfungus · · Score: 1

      LCDs have refresh rates; but they don't 'flicker' the way CRTs do(unless the video source instructs them to).

      Even when displaying a static image, CRTs show substantial variations in brightness(easily visible with video gear; really annoying to the naked eye with lousier hardware) as the electron guns scan about keeping the right phosphors pumped.

      LCDs may flicker at the PWM frequency of the backlight LEDs, if LED backlit; but refresh rate reflects only how often a new image can be sent to the panel, not how often the electron gun redraws the image; so unless the input video is flickery, an LCD won't show appreciable flicker at any refresh rate. The only real issue is if the refresh rate is low enough that you can no longer generate a convincing illusion of continuous motion for things like mouse pointers(opinions vary; but 30Hz drove me nuts for that reason).

    2. Re:Is it not the other way around? by SuperKendall · · Score: 1

      Great point, I was really thinking of the LED refresh rate, but for some reason had got it in my head it was the same as the redraw rate that is as you say not the same...

      I was using my computer recently on a 24Hz screen (HDMI with 4k support) and it didn't really seem to bother me much.

      --
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    3. Re:Is it not the other way around? by fuzzyfuzzyfungus · · Score: 1

      Yeah, it seems to be down to individual preference. I was fine with text based stuff, and most video isn't more than 30fps anyway; but I kept running into a situation where I would move the mouse a bit too fast and the cursor disappearing from where it was in one frame and reappearing where it was for the next frame would show up as a 'blink'/'jump' effect that tweaked my visual response to sudden movement and just drove me nuts.

      Saves you some trouble if you aren't bothered, though, things are way better than they used to be; but 4k at 60Hz is still off the table for a lot of real world hardware combinations.

  16. Devil is in the details by Idou · · Score: 1

    Radiolab broke the story with their http://www.radiolab.org/story/...">Bringing Gamma Back episode. The remarkable thing about this research is that they focused on the lack of gamma wave activity in those suffering from Alzheimers. This has been observed in both the brains of mice and humans.

    If human brains cannot have gamma waves induced with LEDs like mice, I am sure there are many different options for inducing gamma. However, the fact that mice and human brains both have gamma wave patterns and both lack this brain pattern when suffering Alzheimers seems to bode well for the possibility that inducing gamma in human brains will also trigger the brain's self cleaning processes like it did in mice.

    Most research involving mice involves chemical reactions that can be nuanced enough to not apply to humans. However, this specific research seems to be based on the fundamental functionality of the brain which is more likely to be common across various mammals.

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  17. Flickering Lights & Seizures by Anonymous Coward · · Score: 0

    That's great to hear, as some of my cognitive functions are failing enough that I can notice the difference (mostly loosing words - what I call loss in my memory-map: I'll be in a conversation & suddenly stop-dead verbally, as the word &/or phrase that should've come-out & the conversation continue to flow, drops whatever the next word/phrase would be & there's only a blank & reaching for what should be there, either produces nothing at all, or produces a word/phrase that I instinctively know is wrong, but that's all that shows-up...). This is happening on a rising-scale & it is separate from forgetting something: I came into the room to do something, but what? At 66 this may be more than 'old-timers', or not. The flickering lights won't do me any good, as I'm a 'former' eplieptic ('bout 40 yrs ago & long since no longer required Dilantin, etc.), but flickering/strobing lights can still affect me. Dammed if I do & dammed if I don't. Missed the bus again :-\ Hope this new idea/approach can help others, though.

  18. Aural delivery? by TJHook3r · · Score: 1

    How about delivery via the other senses? Eg Binaural Beats? Get on YouTube, there's plenty of Gamma frequencies to experiment with.