Mu opioid receptor stimulation in the medial preoptic area or nucleus accumbens facilitates song and reward in flocking European starlings.

Front Physiol · 2022 · PMC9510710 · PMID 36171974

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a clear trendno p-value reported

Although shy of statistical significance, there was also a clear trend for the siRNA downregulation of MORs to increase beak wiping ( Stevenson et al., 2020 ).

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