Prolactin and gonadal steroids during the reproductive cycle of the Bengalese finch (Lonchura striata var. domestica, Estrildidae), a nonseasonal breeder with biparental care

Seiler, Heidi; Gahr, Manfred; Goldsmith, Arthur R.; Güttinger, Hans Rudolf

doi:10.1016/0016-6480(92)90196-q

Cited by 30 publications

(2 citation statements)

References 25 publications

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“…Lesions to HVC and LMAN have been shown to disrupt auditory discrimination, raising the possibility that these regions are important for song perception as well as production (Brenowitz, 1991; Scharff et al, 1998; Burt et al, 2000; Gentner et al, 2000; but see Theunissen et al, 2008). Social factors have also been shown to affect circulating levels of steroids (Vleck & Priedkalns, 1985; Seiler et al, 1992; Christensen & Vleck, 2008) known to influence dendritic arbor or spine densities in mammals (Kurz et al, 1986; Brusco et al, 2008) as well as adult canaries (DeVoogd & Nottebohm, 1981). Finally, variation in social housing has been shown to affect rates of HVC neuron addition in zebra finches (Lipkind et al, 2002) as well as HVC volume in adult canaries (Boseret et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Anatomical plasticity in the adult zebra finch song system

McDonald

Kirn

2012

J of Comparative Neurology

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In many songbirds, vocal learning-related cellular plasticity was thought to end following a developmental critical period. However, mounting evidence in one such species, the zebra finch, suggests that forms of plasticity common during song learning continue well into adulthood, including a reliance on auditory feedback for song maintenance. This reliance wanes with increasing age, in tandem with age-related increases in fine motor control. We investigated age-related morphological changes in the adult zebra finch song system by focusing on two cortical projection neuron types that a) share a common efferent target, b) are known to exhibit morphological and functional change during song learning, and c) exert opposing influences on song acoustic structure. Neurons in HVC (proper name) and the lateral magnocellular nucleus of the anterior nidopallium (LMAN) both project to the robust nucleus of the arcopallium (RA). During juvenile song learning and adult song maintenance, HVC promotes song syllable stereotypy while LMAN promotes learning and acoustic variability. Following retrograde labeling of these two cell types in adults, there were age-related increases in dendritic arbor in HVC-RA but not LMAN-RA neurons, resulting in an increase in the ratio of HVC-RA:LMAN-RA dendritic arbor. Differential growth of HVC relative to LMAN dendrites may relate to increases in song motor refinement, decreases in the reliance of song on auditory feedback, or both. Despite this differential growth with age, we also show that both cell types retain the capacity for experience-dependent growth. These results may provide insights on mechanisms that promote and constrain adult vocal plasticity.

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Section: Introductionmentioning

confidence: 99%

Anatomical plasticity in the adult zebra finch song system

McDonald

Kirn

2012

J of Comparative Neurology

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“…RCCBs of both sexes had lower levels of circulating T and P4 than zebra nches (Adkins-Regan et al. 1990;McGraw et al 2006;Prior et al 2017), but similar levels to Bengalese nches outside of nest building (Seiler et al 1992).…”

Section: Hormone Resultsmentioning

confidence: 69%

Song system neuroanatomy, and immediate early gene expression in a finch species with extensive male and female song

et al. 2023

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Birdsong is a relatively well-studied behavior, both due to its importance as a model for vocal production learning and as an intriguing complex social behavior. Until the last few decades work on birdsong focused almost exclusively on males. However, it is now widely accepted that female song not only exists, but is fairly common throughout the oscine passerines. Despite this, and the large number of researchers who have begun exploring female song in the eld, researchers in the lab have been slow to adopt model species with female song. Studying female song in the lab is critical for our understanding of sex differences in the physiology controlling this fascinating behavior. Additionally, as a model for vocal production learning in humans, understanding the mechanistic and neuroendocrine control of female song is clearly important. In this study, we report neuroendocrine correlates of female song in the red-cheeked cordon bleu (RCCB), a nch species with extensive female song. Speci cally, we focused on characterizing song rate and circulating hormone levels, as well as nuclei volumes and cell densities within the song control system (SCS). Additionally, we report on motor-driven expression of the immediate early gene ZENK in the SCS of male and female RCCBs.

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Vocal control region sizes of an adult female songbird change seasonally in the absence of detectable circulating testosterone concentrations

Deviche¹,

Gulledge²

2000

J. Neurobiol.

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Previous research established that in several species of seasonally breeding oscine birds, brain areas [vocal control regions (VCRs)] that control vocal behavior learning and expression exhibit seasonal plasticity, being larger during than outside the reproductive period. In adult males, this seasonal decrease correlates with circulating testosterone (T) concentrations. VCRs contain androgen receptors and T plays an important role in neural plasticity and in the control of singing behavior. In behaviorally dimorphic species, VCRs are larger in males than females and change seasonally also in females, but the dependency of these changes on circulating T levels in females has not been established. In free-living adult dark-eyed juncos (Junco hyemalis), a species in which females do not normally sing, the sizes of three VCRs (high vocal center, robust nucleus of the archistriatum, and Area X) were larger in males than females and decreased between summer and fall in both sexes. In males, this decrease was associated with changes in circulating T concentrations. Females, however, had on average undetectable T levels throughout the breeding season. Seasonal changes in VCR volumes in adult females may depend on very low (below detection limit) circulating T concentrations, on nonandrogenic plasma steroids, on androgen (or androgen metabolites) produced in brain tissues, and/or on nonsteroidal factors such as photoperiod or social interactions with conspecific birds.

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Prolactin and gonadal steroids during the reproductive cycle of the Bengalese finch (Lonchura striata var. domestica, Estrildidae), a nonseasonal breeder with biparental care

Cited by 30 publications

References 25 publications

Anatomical plasticity in the adult zebra finch song system

Anatomical plasticity in the adult zebra finch song system

Song system neuroanatomy, and immediate early gene expression in a finch species with extensive male and female song

Vocal control region sizes of an adult female songbird change seasonally in the absence of detectable circulating testosterone concentrations

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