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We have found a special hedonic hotspot that is crucial for reward 'liking' and 'wanting' (and codes reward learning too). The opioid hedonic hotspot is shown in red above. It works together with another hedonic hotspot in the more famous nucleus accumbens to generate pleasure 'liking'.‘Liking’ and ‘wanting’ food rewards: Brain substrates and roles in eating disorders Kent C. Berridge 2009 Mar 29. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2717031/ [nofollow]