Recent experience modulates forebrain gene–expression in response to mate–choice cues in European starlings

Sockman, Keith W.; Gentner, Timothy Q.; Ball, Gregory F.

doi:10.1098/rspb.2002.2180

Cited by 105 publications

(112 citation statements)

References 42 publications

(36 reference statements)

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“…Alternatively, one toral region may provide all acoustic processing used for mating decisions, but the distinct functions of the other regions (e.g., sound localization) yield egr-1 response patterns conducive to statistical, but not behavioral, stimulus discrimination. In this latter case, forebrain targets of the toral region responsible for call processing may have significant egr-1 biases both for conspecific calls and for whinechucks over whines, although no midbrain region showed such biases, as has been shown in a songbird (Sockman et al, 2002). Further experiments are required to determine whether the auditory midbrain regions have different analytic or integrative functions, and how these roles relate to thalamic specializations (Hall and Feng, 1987) and mating call detection in other brain regions.…”

Section: Parallel Processing Of Complex Acoustic Stimulimentioning

confidence: 93%

“…We chose egr-1 quantification as our measure of neural activity based on its previous effectiveness in measuring auditory biases for acoustic communication signals (Mello et al, 1992;Gentner et al, 2001;Sockman et al, 2002;Maney et al, 2003). Neuronal egr-1 expression is regulated by synaptic activity and is linked to membrane depolarization through multiple second messenger cascades (Murphy et al, 1991;Whitmarsh et al, 1995;Treisman, 1996;Harada et al, 2001;Sweatt, 2001;Bozon et al, 2003;Buchwalter et al, 2004;Cheng and Clayton, 2004).…”

Section: Methodsmentioning

confidence: 99%

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Functional Mapping of the Auditory Midbrain during Mate Call Reception

Hoke¹,

Burmeister²,

Fernald³

et al. 2004

J. Neurosci.

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We examined patterns of neural activity as assayed by changes in gene expression to localize representation of acoustic mating signals in the auditory midbrain of frogs. We exposed wild-caught male Physalaemus pustulosas to conspecific mating calls that vary in their behavioral salience, nonsalient mating calls, or no sound. We measured expression of the immediate early gene egr-1 (also called ZENK, zi/268, NGFI-A, and krox-lA) throughout the torus semicircularis, the auditory midbrain homolog of the inferior coUiculus. Differential egr-1 induction in response to the acoustic stimuli occurred in the laminar, midline, and principal nuclei of the torus semicircularis, whereas the ventral region did not show significant effects of stimulus. The laminar nucleus differentially responded to conspecific mating calls compared with nonsalient mating calls, whereas the midline and principal nuclei responded preferentially to one of two conspecific calls. These responses were not explained by simple acoustic properties of the stimuli, and they demonstrate a functional heterogeneity of auditory processing of complex biological signals within the frog midbrain. Moreover, using analyses that assess the ability of the torus semicircularis as a whole to discriminate among acoustic stimuli, we found that activity patterns in the four regions together provide more information about biologically relevant acoustic stimuli than activity in any single region.

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Section: Parallel Processing Of Complex Acoustic Stimulimentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Functional Mapping of the Auditory Midbrain during Mate Call Reception

Hoke¹,

Burmeister²,

Fernald³

et al. 2004

J. Neurosci.

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“…ovulation order of the first-breeding attempt) and withingeneration fine-tuning of an induced effect (e.g. in relation to familiarity with mate, food fluctuations) are frequently documented (Cheng 1986;Yoo et al 1986;Sockman et al 2002;Pfaff et al 2004) and commonly attributed to complexity and redundancy of endocrine reproductive systems where the same hormonal mechanisms are involved in the assessment of environmental variation and oocyte proliferation and ovulation (e.g. Ball & Balthazart 2008).…”

Section: Evidence For the Baldwin Effect's Processes (A) Environmentamentioning

confidence: 99%

Evolutionary significance of phenotypic accommodation in novel environments: an empirical test of the Baldwin effect

Badyaev

2009

Phil. Trans. R. Soc. B

164

123

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When faced with changing environments, organisms rapidly mount physiological and behavioural responses, accommodating new environmental inputs in their functioning. The ubiquity of this process contrasts with our ignorance of its evolutionary significance: whereas within-generation accommodation of novel external inputs has clear fitness consequences, current evolutionary theory cannot easily link functional importance and inheritance of novel accommodations. One hundred and twelve years ago, J. M. Baldwin, H. F. Osborn and C. L. Morgan proposed a process (later termed the Baldwin effect) by which non-heritable developmental accommodation of novel inputs, which makes an organism fit in its current environment, can become internalized in a lineage and affect the course of evolution. The defining features of this process are initial overproduction of random (with respect to fitness) developmental variation, followed by withingeneration accommodation of a subset of this variation by developmental or functional systems ('organic selection'), ensuring the organism's fit and survival. Subsequent natural selection sorts among resultant developmental variants, which, if recurrent and consistently favoured, can be inherited when existing genetic variance includes developmental components of individual modifications or when the ability to accommodate novel inputs is itself heritable. Here, I show that this process is consistent with the origin of novel adaptations during colonization of North America by the house finch. The induction of developmental variation by novel environments of this species's expanding range was followed by homeostatic channelling, phenotypic accommodation and directional cross-generational transfer of a subset of induced developmental outcomes favoured by natural selection. These results emphasize three principal points. First, contemporary novel adaptations result mostly from reorganization of existing structures that shape newly expressed variation, giving natural selection an appearance of a creative force. Second, evolutionary innovations and maintenance of adaptations are different processes. Third, both the Baldwin and parental effects are probably a transient state in an evolutionary cycle connecting initial phenotypic retention of adaptive changes and their eventual genetic determination and, thus, the origin of adaptation and evolutionary change.

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“…Nevertheless, female zebra finches can learn to recognize songs to which they have been exposed, and they develop a preference for these songs (Riebel, 2000;Riebel et al, 2002). Several studies have shown that both the NCM and the CMHV are involved in processing conspecific songs in female songbirds (Chew et al, 1996;MacDougall-Shackleton et al, 1998;Duffy et al, 1999;Gentner et al, 2001;Bailey et al, 2002;Sockman et al, 2002;Bailey and Wade, 2003;Gentner and Margoliash, 2003;Grace et al, 2003;Maney et al, 2003;Phillmore et al, 2003), as well as in female budgerigars . Preliminary results from our own laboratory indicate that, in female zebra finches, the CMHV may be part of the neural representation of learned tutor song (Terpstra et al, 2001).…”

Section: The Role Of the Cmhv In Tutor Song Representationmentioning

confidence: 99%

An Analysis of the Neural Representation of Birdsong Memory

Terpstra¹,

Bolhuis²,

Boer-Visser³

2004

J. Neurosci.

125

141

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Songbirds, such as zebra finches, learn their song from a tutor early in life. Forebrain nuclei in the "song system" are important for the acquisition and production of song. Brain regions [including the caudomedial part of the neostriatum (NCM) and of the hyperstriatum ventrale (CMHV)] outside the song system show increased neuronal activation, measured as expression of immediate early genes (IEGs), when zebra finch males are exposed to song. IEG expression in the NCM in response to tutor song is significantly positively correlated with the strength of song learning (i.e., the number of elements copied). Here, we exposed three groups of adult zebra finch males to tutor song, to their own song, or to novel conspecific song. The two control groups were included to examine an alternative explanation of our previous results in terms of variation in predisposed levels of attentiveness. Expression of Zenk, the protein product of the IEG ZENK, was measured in the NCM, CMHV, and hippocampus. There were no significant differences in overall Zenk expression between the three experimental groups. However, there was a significant positive correlation between Zenk expression in the NCM (but not in the other two regions) and strength of song learning in the males that were exposed to the tutor song. There was no such correlation in the other two groups. These results suggest that experience-related neuronal activation is specific to the tutor song and thus unlikely to be a result of differences in attention.

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Recent experience modulates forebrain gene–expression in response to mate–choice cues in European starlings

Cited by 105 publications

References 42 publications

Functional Mapping of the Auditory Midbrain during Mate Call Reception

Functional Mapping of the Auditory Midbrain during Mate Call Reception

Evolutionary significance of phenotypic accommodation in novel environments: an empirical test of the Baldwin effect

An Analysis of the Neural Representation of Birdsong Memory

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