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We think that the hippocampus carries information about temporal context such
that, (as) the temporal context information become more and more less similar
The activity pattern become also less similar.
>> According to one story, the hippocampus might treat events that
occurred, let's say with your mom, in very different places and time.
To file those in a similar way.
So that if you retrieve one memory you can retrieve others.
Another way of thinking about it is that The brain would actually take events that
involved completely different people that occurred around the
same points in time and file those together.
>> Before we put a participant into a scanner,
we had a participant learn a bunch of object sequences.
And then while they were in the scanner, they'd perform an independent task.
That they required him, you know, that,
even though they don't really need to actively
retrieve the sequence information, but they still incidentally
use the sequence information to guide their behaviors.
So we can see the activity pattern associated with a specific object.
And we see that as the object pair become more
and more temporal, temporally distant, they become less and less similar.
>> And what our data suggests is that the
hippocampus is precisely the brain area that does this.
It separates memories according to the
temporal context in which they're encountered.
So if you see the same object, but the temporal context changes
we, we don't, we see that and stores those memories very differently.
It's pretty important because you'd also like to be
able to remember when's the last time you took
your medicine or you know, so for patients with
memory problems this is a big deal, you know.
So It's not just a matter of something
that's useful in understanding healthy memory, but it actually
you know, would allow us to better understand and
intervene in cases where people have memory problems too.
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