First images of cerebrospinal fluid in the brain during sleep (2019) • Hacker News Board

Re: First images of cerebrospinal fluid in the brain during sleep (2019)

#21

Post by robg » Sat, Feb 05, 2022, 5:43 PM UTC

erikerikson wrote: post #12

This is curious. During my research into neutral networks we depended on a neuroscience result that found waves of trophic factor (i.e. the stuff used to build up neurons [i.e. learn]) travel in cascading waves from the core of the brain to the periphery. By adding a sense of location and a learning term contingent on the factor we saw learning (xor) prohibited by Minsky's result (not really prohibited because we cha…

Where AI and neural networks still have so much to learn from actual intelligence. Seems like the technical and computational problem set for this century, where a greater understanding of brains will branch out more broadly.

Re: First images of cerebrospinal fluid in the brain during sleep (2019)

#22

Post by staticassertion » Sat, Feb 05, 2022, 5:45 PM UTC

hbarka wrote: post #19

What is the ideal sleeping position to maximize brain wash? Is it back, side, slightly inclined? Fluids theory would surely dictate how we can better align our body to encourage this. Intuition says our neck torsion must be instrumental to a good flow.

If I'm lucky, constant tossing and turning.

Re: First images of cerebrospinal fluid in the brain during sleep (2019)

#23

Post by MithrilTuxedo » Sat, Feb 05, 2022, 5:48 PM UTC

hbarka wrote: post #19

What is the ideal sleeping position to maximize brain wash? Is it back, side, slightly inclined? Fluids theory would surely dictate how we can better align our body to encourage this. Intuition says our neck torsion must be instrumental to a good flow.

I assume you would want to rotate.

Re: First images of cerebrospinal fluid in the brain during sleep (2019)

#24

Post by Mezzie » Sat, Feb 05, 2022, 5:49 PM UTC

datameta wrote: post #13

Mezzie wrote: post #10

Earlier quoted context omitted.

I get an MRI once a year and I frequently fall asleep because nothing puts me to sleep like mechanical white noise. It's kind of a problem because I try to move or jerk awake, which ruins the MRI. My MRIs take forever. I feel terrible for the attendants.

I used to get a funny look when instead of a choice of music I opted for silence in the headphones during an MRI. Then I think I started to say it dismissively enough with conviction and got nonreactions.

I never understood opting for music. MRIs are so loud; the last thing I want on top of it is competing noise. How is that not sheer cacophony?

Re: First images of cerebrospinal fluid in the brain during sleep (2019)

#25

Post by ilrwbwrkhv » Sat, Feb 05, 2022, 5:50 PM UTC

Wonder if transcendental meditation achieves something similar.

Re: First images of cerebrospinal fluid in the brain during sleep (2019)

#26

Post by MattGaiser » Sat, Feb 05, 2022, 5:54 PM UTC

Mezzie wrote: post #10

bjackman wrote: post #7

Re falling asleep during MRI - I was a subject in a study where for about an hour you had to lie in a machine and repeatedly indicate which of two pictures depicted a larger object. They said subjects falling asleep was a big problem! I find sleeping very difficult and even I was feeling extremely drowsy after 45 mins of lying down and establishing "elephants are bigger than mice. Houses are bigger than shoes. Trees…

I get an MRI once a year and I frequently fall asleep because nothing puts me to sleep like mechanical white noise. It's kind of a problem because I try to move or jerk awake, which ruins the MRI. My MRIs take forever. I feel terrible for the attendants.

How is your aircraft sleeping?

Re: First images of cerebrospinal fluid in the brain during sleep (2019)

#27

Post by nomadpenguin » Sat, Feb 05, 2022, 5:55 PM UTC

exdsq wrote: post #18

Oh cool, my wife’s in the lab of one of the coauthors. It seems like brain imaging is a really really small world.

I recently worked on a project involving segmenting clinical CT scans. Almost every python package for working with CTs was written by the same guy.

Re: First images of cerebrospinal fluid in the brain during sleep (2019)

#28

Post by datameta » Sat, Feb 05, 2022, 5:57 PM UTC

Mezzie wrote: post #24

datameta wrote: post #13

Earlier quoted context omitted.

I used to get a funny look when instead of a choice of music I opted for silence in the headphones during an MRI. Then I think I started to say it dismissively enough with conviction and got nonreactions.

I never understood opting for music. MRIs are so loud; the last thing I want on top of it is competing noise. How is that not sheer cacophony?

MRIs are stunningly loud indeed. The music would distract me from the noise patterns which other than being interesting to me don't keep me from napping in what to me is a cozy tunnel (whereas the music might).

Re: First images of cerebrospinal fluid in the brain during sleep (2019)

#29

Post by [deleted] » Sat, Feb 05, 2022, 5:58 PM UTC

staticassertion wrote: post #22

hbarka wrote: post #19

What is the ideal sleeping position to maximize brain wash? Is it back, side, slightly inclined? Fluids theory would surely dictate how we can better align our body to encourage this. Intuition says our neck torsion must be instrumental to a good flow.

If I'm lucky, constant tossing and turning.

[deleted]

Re: First images of cerebrospinal fluid in the brain during sleep (2019)

#30

Post by nxmnxm99 » Sat, Feb 05, 2022, 5:59 PM UTC

hbarka wrote: post #19

What is the ideal sleeping position to maximize brain wash? Is it back, side, slightly inclined? Fluids theory would surely dictate how we can better align our body to encourage this. Intuition says our neck torsion must be instrumental to a good flow.

Of all the worldly anxieties dominating modern existence I cannot imagine why you would want to add another one