Napisano 20.10.2007 - 21:06
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(oobe - czyżby zwierzęta też mogły doświadczyć tego zjawiska?)
Napisano 22.10.2007 - 16:12
Professor Wilson and biology graduate student Kenway Louie trained rats to run along a circular track for a food reward. They monitored the animals' brain activity during the task and while they were asleep. While the animal ran, its brain created a distinctive pattern of neurons firing in the hippocampus, a brain area known to be involved in memory.
Like us, rats go through multiple stages of sleep, from slow-wave sleep to REM sleep. In humans, it is during REM sleep that most dreaming occurs.
The researchers then examined more than 40 REM episodes recorded while the rats slept. About half repeated the unique signature of brain activity that was created as the animal ran. The correlation was so close that the researchers found that as the animal dreamed, they could reconstruct where it would be in the maze if it were awake and whether the animal was dreaming of running or standing still.
These memories were replayed at about the same speed that the animal had experienced them while awake.
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