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Researchers map the amygdala’s distinct but diverse and dynamic neighborhoods where feelings are assigned.

The amygdala is a tiny hub of emotions where in 2016 a team led by MIT neuroscientist Kay Tye found specific populations of neurons that assign good or bad feelings, or “valence,” to experience. Learning to associate pleasure with a tasty food, or aversion to a foul-tasting one, is a primal function and key to survival.

In a new study in Cell Reports, Tye’s team at the Picower Institute for Learning and Memory returns to the amygdala for an unprecedentedly deep dive into its inner workings. Focusing on a particular section called the basolateral amygdala, the researchers show how valence-processing circuitry is organized and how key neurons in those circuits interact with others. What they reveal is a region with distinct but diverse and dynamic neighborhoods where valence is sorted out by both connecting with other brain regions and sparking cross-talk within the basolateral amygdala itself. Original Article »

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