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Scientists monitored brains replaying memories in real time

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11–20 of 55 posts

Re: Scientists monitored brains replaying memories in real time

#11
post #2

What a timely article, as I JUST watched Brainstorm for the first time tonight. The story is exactly this.

It's called the Baader-Meinhof phenomenon (https://en.wikipedia.org/wiki/List_of_cognitive_biases#Frequ...), and now that you know that, you're gonna be seeing examples of it everywhere.

Re: Scientists monitored brains replaying memories in real time

#12
post #8

One of the most fascinating things this article claims is that apparently these scientists were able to detect the firing of individual neurons. I have briefly looked up some of the technologies involved in brain scanning before and if this is true it would be greatly exceeding typical resolutions.

Well, it's not a scan, it's a recording from a micro-electrode array (MEA) implanted directly into patient's brains who's skull was already opened for (I guess) surgery.

Direct link to the article (with paywall): https://science.sciencemag.org/content/367/6482/1131

DOI: 10.1126/science.aba0672

Re: Scientists monitored brains replaying memories in real time

#14
post #5

"NIH researchers found that our brains may store memories in neuronal firing patterns that are replayed fractions of a second before remembering." So it's like a phonograph record. First the track is inscribed from the source sound (storing a memory). Then the needle is placed in a groove (by some triggering experience). Then the needle traverses the inscription, playing back the recording (remembering). The brain ju…

To me, it much more closely resembles a key-value retrieval system. I wonder if we could learn anything about that by training an artificial neural net to perform key-value storage?

Yeah, my brain can prolly be 80% modeled as a Redis fork...

Re: Scientists monitored brains replaying memories in real time

#16
post #5

"NIH researchers found that our brains may store memories in neuronal firing patterns that are replayed fractions of a second before remembering." So it's like a phonograph record. First the track is inscribed from the source sound (storing a memory). Then the needle is placed in a groove (by some triggering experience). Then the needle traverses the inscription, playing back the recording (remembering). The brain ju…

All information requires a physical substrate. This should not be surprise to anyone who doesn’t believe in magic

Re: Scientists monitored brains replaying memories in real time

#17
post #5

"NIH researchers found that our brains may store memories in neuronal firing patterns that are replayed fractions of a second before remembering." So it's like a phonograph record. First the track is inscribed from the source sound (storing a memory). Then the needle is placed in a groove (by some triggering experience). Then the needle traverses the inscription, playing back the recording (remembering). The brain ju…

To me, it much more closely resembles a key-value retrieval system. I wonder if we could learn anything about that by training an artificial neural net to perform key-value storage?

I think it's more like a graph with edges between associated bits of information. It's easy to remember things in order, but random access is hard unless you've established links for it. For example, if you memorized how to play a song, each part links to the next but harder to ask someone what is the n-th note in a song, even if they can play the song. It would explain why making associations is a useful memory technique. Traversing this graph when you aren't near what you're looking for can be hard ("it's on the tip of my tongue").

Re: Scientists monitored brains replaying memories in real time

#19
post #5

"NIH researchers found that our brains may store memories in neuronal firing patterns that are replayed fractions of a second before remembering." So it's like a phonograph record. First the track is inscribed from the source sound (storing a memory). Then the needle is placed in a groove (by some triggering experience). Then the needle traverses the inscription, playing back the recording (remembering). The brain ju…

To me, it much more closely resembles a key-value retrieval system. I wonder if we could learn anything about that by training an artificial neural net to perform key-value storage?

Content addressable memory more like.

Re: Scientists monitored brains replaying memories in real time

#20
This reminds me of a tangentially related episode of mind field, in which a Japanese researcher is working on tech that one day could be able to read people's dreams: https://www.youtube.com/watch?v=AgbeGFYluEA&vl=en

They basically ask people to look at different faces and measure their brain waves while they're doing so and then later ask them to think of different faces from the ones they saw and try to guess which one they were thinking of at that time. Pretty cool.

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