Regulation of Food Intake in a Migratory Songbird (Junco hyemalis): Participation of Endorphinergic Mechanisms

Deviche, Pierre

doi:10.2307/3676647

Cited by 6 publications

(2 citation statements)

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“…Studies in birds (e.g., pigeons, domestic chicks, and juncos) show that opioids play a role in feeding (Deviche and Schepers, 1983; Deviche et al, 1984; Deviche, 1992; McCormack and Denbow, 1987). Additionally, past studies in rats implicate opioids in both the VTA and PAG in feeding behavior (Jenck et al, 1987; Mucha and Iversen, 1986).…”

Section: Discussionmentioning

confidence: 99%

Curvilinear relationships between mu-opioid receptor labeling and undirected song in male European starlings (Sturnus vulgaris)

Kelm‐Nelson

Riters

2013

Brain Research

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Female-directed communication in male songbirds has been reasonably well studied; yet, relatively little is known about communication in other social contexts. Songbirds also produce song that is not clearly directed towards another individual (undirected song) when alone or in flocks. Although the precise functions of undirected song may differ across species, this type of song is considered important for flock maintenance, song learning or practice. Past studies show that undirected song is tightly coupled to analgesia and positive affective state, which are both mediated by opioid activity. Furthermore, labeling for the opioid met-enkephalin in the medial preoptic nucleus (POM) correlates positively with undirected song production. We propose that undirected song is facilitated and maintained by opioid receptor activity in the POM and other brain regions involved in affective state, analgesia, and social behavior. To provide insight into this hypothesis, we used immunohistochemistry to examine relationships between undirected song and mu-opioid receptors in male starlings. Polynomial regression analyses revealed significant inverted-U shaped relationships between measures of undirected song and mu-opioid receptor labeling in the POM, medial bed nucleus of the stria terminalis (BSTm), and periaqueductal gray (PAG). These results suggest that low rates of undirected song may stimulate and/or be maintained by mu-opioid receptor activity; however, it may be that sustained levels of mu-opioid receptor activity associated with high rates of undirected song cause mu-opioid receptor down-regulation. The results indicate that mu-opioid receptor activity in POM, BSTm, and PAG may underlie previous links identified between undirected song, analgesia, and affective state.

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Section: Discussionmentioning

confidence: 99%

Curvilinear relationships between mu-opioid receptor labeling and undirected song in male European starlings (Sturnus vulgaris)

Kelm‐Nelson

Riters

2013

Brain Research

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“…At the time of capture, cloacal protuberance (an androgen-dependent secondary sexual characteristic; Schwabl and Farner, 1989;Deviche, 1992Deviche, , 1995 …”

Section: Materials and Methods Animalsmentioning

confidence: 99%

Central vasotocin-immunoreactive system in a male passerine bird (Junco hyemalis)

et al. 1999

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Central Opioid Control of Feeding Behavior in the White-Crowned Sparrow,Zonotrichia leucophrys gambelii

Maney

Wingfield

1998

Hormones and Behavior

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Regulation of Food Intake in a Migratory Songbird (Junco hyemalis): Participation of Endorphinergic Mechanisms

Cited by 6 publications

References 36 publications

Curvilinear relationships between mu-opioid receptor labeling and undirected song in male European starlings (Sturnus vulgaris)

Curvilinear relationships between mu-opioid receptor labeling and undirected song in male European starlings (Sturnus vulgaris)

Central vasotocin-immunoreactive system in a male passerine bird (Junco hyemalis)

Central Opioid Control of Feeding Behavior in the White-Crowned Sparrow,Zonotrichia leucophrys gambelii

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