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Charan Ranganath

๐Ÿ‘ค Speaker
3063 total appearances

Appearances Over Time

Podcast Appearances

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

We're still figuring that out, but that's going to be coming largely from model systems that are easier to understand. You can do manipulations like drug manipulations to manipulate circuits and use viruses and so forth and lasers to turn on circuits that you just can't do in humans. So I think there's a lot that can be learned from mice. There's a lot that can be learned from non-human primates.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

We're still figuring that out, but that's going to be coming largely from model systems that are easier to understand. You can do manipulations like drug manipulations to manipulate circuits and use viruses and so forth and lasers to turn on circuits that you just can't do in humans. So I think there's a lot that can be learned from mice. There's a lot that can be learned from non-human primates.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

We're still figuring that out, but that's going to be coming largely from model systems that are easier to understand. You can do manipulations like drug manipulations to manipulate circuits and use viruses and so forth and lasers to turn on circuits that you just can't do in humans. So I think there's a lot that can be learned from mice. There's a lot that can be learned from non-human primates.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

And then there's a lot that you need to learn from humans. And I think, unfortunately, some of the people in the National Institutes of Health think you can learn everything from the mouse. It's like, why study memory in humans when I could study learning in a mouse? And just like, oh my God, I'm going to get my funding from somewhere else.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

And then there's a lot that you need to learn from humans. And I think, unfortunately, some of the people in the National Institutes of Health think you can learn everything from the mouse. It's like, why study memory in humans when I could study learning in a mouse? And just like, oh my God, I'm going to get my funding from somewhere else.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

And then there's a lot that you need to learn from humans. And I think, unfortunately, some of the people in the National Institutes of Health think you can learn everything from the mouse. It's like, why study memory in humans when I could study learning in a mouse? And just like, oh my God, I'm going to get my funding from somewhere else.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

So deja vu is, it's actually one of these things I think that some of the surveys suggest that like 75% of people report having a deja vu experience one time or another. I don't know where that came from, but I've polled people in my class and most of them say they've experienced deja vu. It's this kind of sense that I've experienced this moment sometime before, I've been here before.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

So deja vu is, it's actually one of these things I think that some of the surveys suggest that like 75% of people report having a deja vu experience one time or another. I don't know where that came from, but I've polled people in my class and most of them say they've experienced deja vu. It's this kind of sense that I've experienced this moment sometime before, I've been here before.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

So deja vu is, it's actually one of these things I think that some of the surveys suggest that like 75% of people report having a deja vu experience one time or another. I don't know where that came from, but I've polled people in my class and most of them say they've experienced deja vu. It's this kind of sense that I've experienced this moment sometime before, I've been here before.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

And actually, there's all sorts of variants of this. The French have all sorts of names for various versions of the chamivou, parleyvou, I don't know. All these different vous. But dรฉjร  vu is the sense that it can be an almost disturbing intense sense of familiarity. So there is a researcher named Wilder Penfield. Actually, this goes back even earlier to some of the earliest

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

And actually, there's all sorts of variants of this. The French have all sorts of names for various versions of the chamivou, parleyvou, I don't know. All these different vous. But dรฉjร  vu is the sense that it can be an almost disturbing intense sense of familiarity. So there is a researcher named Wilder Penfield. Actually, this goes back even earlier to some of the earliest

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

And actually, there's all sorts of variants of this. The French have all sorts of names for various versions of the chamivou, parleyvou, I don't know. All these different vous. But dรฉjร  vu is the sense that it can be an almost disturbing intense sense of familiarity. So there is a researcher named Wilder Penfield. Actually, this goes back even earlier to some of the earliest

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

Hughlings Jackson was this neurologist who did a lot of the early characterizations of epilepsy. And one of the things he notices in epilepsy patients, some group of them, right before they would get a seizure, they would have this intense sense of deja vu. So it's this artificial sense of familiarity. It's a sense of having a memory that's not there, right?

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

Hughlings Jackson was this neurologist who did a lot of the early characterizations of epilepsy. And one of the things he notices in epilepsy patients, some group of them, right before they would get a seizure, they would have this intense sense of deja vu. So it's this artificial sense of familiarity. It's a sense of having a memory that's not there, right?

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

Hughlings Jackson was this neurologist who did a lot of the early characterizations of epilepsy. And one of the things he notices in epilepsy patients, some group of them, right before they would get a seizure, they would have this intense sense of deja vu. So it's this artificial sense of familiarity. It's a sense of having a memory that's not there, right?

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

And so what was happening was there was electrical activity in certain parts of these brains. And so this guy Penfield later on, when he was trying to look for how do we map out the brain to figure out which parts we want to remove and which parts don't we, he he would stimulate parts of the temporal lobes of the brain and find you could elicit the sense of deja vu.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

And so what was happening was there was electrical activity in certain parts of these brains. And so this guy Penfield later on, when he was trying to look for how do we map out the brain to figure out which parts we want to remove and which parts don't we, he he would stimulate parts of the temporal lobes of the brain and find you could elicit the sense of deja vu.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

And so what was happening was there was electrical activity in certain parts of these brains. And so this guy Penfield later on, when he was trying to look for how do we map out the brain to figure out which parts we want to remove and which parts don't we, he he would stimulate parts of the temporal lobes of the brain and find you could elicit the sense of deja vu.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

Sometimes you'd actually get a memory that a person would re-experience just from electrically stimulating some parts. Sometimes they just have this intense feeling of being somewhere before. And so one theory which I really like is is that in higher order areas of the brain, they're integrating for many, many different sources of input.

Lex Fridman Podcast
#430 โ€“ Charan Ranganath: Human Memory, Imagination, Deja Vu, and False Memories

Sometimes you'd actually get a memory that a person would re-experience just from electrically stimulating some parts. Sometimes they just have this intense feeling of being somewhere before. And so one theory which I really like is is that in higher order areas of the brain, they're integrating for many, many different sources of input.