Valence And Valence Assignment
For a human or animal to learn whether to avoid, or seek out, a particular experience again in the future, their brain must associate a positive or negative feeling, or “valence” with that stimulus. The brain’s ability to link these feelings with a memory is called “valence assignment”.
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Researchers discovered a specific neurotransmitter that helps assign either positive or negative emotions to memories. Their discovery paves the way for a better understanding of why some people are more likely to retain negative emotions than positive ones—as can occur with anxiety, depression or post-traumatic stress disorder (PTSD).
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