2005/01/01 by Lauren V. Riters, Molly B. Schroeder, Catherine J. Auger +3
Biochemistry, Genetics and Molecular Biology · Agricultural and Biological Sciences · Environmental Science · #Animal Vocal Communication and Behavior #Animal Behavior and Reproduction #Marine animal studies overview
paper · doi:10.1037/0735-7044.119.1.245
Many social animals vocalize at high rates, suggesting that vocal communication is highly motivated and rewarding. In songbirds, much is known about the neural control of vocal behavior; however, little is known about neurobiological mechanisms regulating the motivation to communicate. This study examined a possible role for opioid neuropeptides in motivation and reward associated with song production in male European starlings (Sturnus vulgaris). Peripheral opioid blockade facilitated male song production. Furthermore, methionine-enkephalin immunolabeled fiber densities within brain regions in which opioids are known to regulate motivation and reward (i.e., the medial preoptic nucleus and ventral tegmental area) related positively to male song production. These data suggest that song production might be regulated by opioid activity within motivation and reward neural systems.