A study in Nature reports that nematodes can learn to associate different chemosensory stimuli with illness and to avoid these stimuli in a choice test. Elevated serotonin in a particular type of neuron was critical for this learning.
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Jessica Iannuzzi
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Quinn, W. Nematodes learn: now what?. Nat Neurosci 8, 1639–1640 (2005). https://doi.org/10.1038/nn1205-1639
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DOI: https://doi.org/10.1038/nn1205-1639
