Pleasure seeking and birdsong.
Songbirds sing at high rates within multiple contexts, suggesting that they are highly motivated to communicate and that the act of singing itself may be rewarding. Little is known about the neural regulation of the motivation to communicate. Dopamine and opioid neuropeptides play a primary role in reward seeking and sensory pleasure. In songbirds, these neurochemicals are found within brain regions implicated in both motivation and reward, including the medial preoptic nucleus (mPOA) and ventral tegmental area (VTA). Several lines of research indicate that dopamine and opioids in these regions play a role in birdsong that differs depending upon whether song is used to attract females (female-directed song) or is not directed towards other individuals (undirected song). Evidence is reviewed supporting the hypotheses: (1) that distinct patterns of dopamine activity influence the motivation to produce undirected and female-directed song, (2) that undirected communication is intrinsically reinforced by immediate release of opioids induced by the act of singing, and (3) that directed communication is socially reinforced by opioids released as part of social interactions.
Department of Zoology, University of Wisconsin - Madison, 428 Birge Hall, 430 Lincoln Avenue, Madison, WI 53706, USA. LVRiters@wisc.edu
Lauren V
LV
Riters
D000701:Analgesics, Opioid / Q000378:metabolism / Q000494:pharmacology; D000818:Animals; D001717:Birds / Q000502:physiology*; D004298:Dopamine / Q000378:metabolism / Q000502:physiology; D004723:Endorphins / Q000502:physiology; D005260:Female; D006706:Homeostasis / Q000502:physiology; D008297:Male; D009042:Motivation / Q000502:physiology; D057181:Pleasure / Q000187:drug effects / Q000502:physiology*; D011301:Preoptic Area / Q000502:physiology; D046749:Starlings / Q000502:physiology; D017557:Ventral Tegmental Area / Q000502:physiology; D014828:Vocalization, Animal / Q000187:drug effects / Q000502:physiology*
D000701:Analgesics, Opioid; D004723:Endorphins; D004298:Dopamine
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