Researchers have uncovered how perceptual memories linked to positive emotions, such as joy or happiness, are strengthened during sleep. The study could help scientists understand the neurological basis for overcoming conditions like drug addiction.
Researchers at the RIKEN Center for Brain Science have uncovered how perceptual memories linked to positive emotions, such as joy or happiness, are strengthened during sleep. The study, published in the scientific journal, could help scientists understand the neurological basis for overcoming conditions like drug or sexual addiction.
However, when the smooth texture was paired with a positive emotional experience -- interaction with a female mouse -- the memory of the texture lasted much longer. Even with a four-day interval, at day 5, the mice still preferred the smooth texture, showing that this experimental setup could produce emotionally enhanced texture memory in mice. As Murayama explains,"this is the first study to demonstrate perceptual memory enhancement through emotions in experimental animals.
"Traditionally, REM sleep has been thought to be the primary stage for emotional memory processing," says Murayama."Our findings challenge this idea and instead support non-REM sleep as the critical stage."
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