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A recent study from the Waddell Group (DPAG) published in Nature, reveals how the strength of memory-directed behavior is either suppressed or maintained depending on whether a new experience opposes or fits a previously learned expectation.

Their paper "Re-evaluation of learned information in Drosophila" demonstrates that different dopaminergic neurons in the Drosophila brain work in support or opposition to a previous memory of food reward and so allow the fly to accumulate information from all experiences to optimise behaviour.

Read more (DPAG website)