Estradiol modulates neural responses to song in a seasonal songbird
Identifieur interne : 000557 ( Main/Exploration ); précédent : 000556; suivant : 000558Estradiol modulates neural responses to song in a seasonal songbird
Auteurs : Donna L. Maney [États-Unis] ; Christopher T. Goode [États-Unis] ; Henry S. Lange [États-Unis] ; Sara E. Sanford [États-Unis] ; Benjamin L. Solomon [États-Unis]Source :
- Journal of Comparative Neurology [ 0021-9967 ] ; 2008-11-10.
English descriptors
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Abstract
Social behaviors such as courtship, parenting, and aggression depend primarily on two factors: a social signal to trigger the behavior, and a hormonal milieu that facilitates or permits it. Gonadal steroids may alter the valence or perceived context of the signal so that the same pheromone, vocalization, or visual display may elicit very different responses depending on the receiver's plasma hormone level. The neural processes underlying this phenomenon, however, are not well understood. Here, we describe how hormones modulate neural responses to social signals in female white‐throated sparrows listening to recordings of male song. While manipulating levels of the ovarian steroid estradiol, we mapped and quantified sound‐induced expression of the immediate early gene egr‐1 in nine brain regions that constitute a social behavior network in vertebrates. In most regions of interest, hearing male song induced more expression than hearing tones or silence, and this selectivity for song was seen only in birds with estradiol levels typical of the breeding season. In females with regressed ovaries and no exogenous estradiol, neural responses were selective for song over tones only in the lateral portion of the ventromedial hypothalamus, not in the rest of the network. Because the effects of hormone treatment on neural responses are not identical in each region, the overall pattern of activation across the network changes with estradiol level and thus with season and breeding context. Our results demonstrate a possible mechanism by which gonadal steroids may alter the processing of social signals and affect social decision‐making. J. Comp. Neurol. 511:173–186, 2008. © 2008 Wiley‐Liss, Inc.
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DOI: 10.1002/cne.21830
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Gonadal steroids may alter the valence or perceived context of the signal so that the same pheromone, vocalization, or visual display may elicit very different responses depending on the receiver's plasma hormone level. The neural processes underlying this phenomenon, however, are not well understood. Here, we describe how hormones modulate neural responses to social signals in female white‐throated sparrows listening to recordings of male song. While manipulating levels of the ovarian steroid estradiol, we mapped and quantified sound‐induced expression of the immediate early gene egr‐1 in nine brain regions that constitute a social behavior network in vertebrates. In most regions of interest, hearing male song induced more expression than hearing tones or silence, and this selectivity for song was seen only in birds with estradiol levels typical of the breeding season. In females with regressed ovaries and no exogenous estradiol, neural responses were selective for song over tones only in the lateral portion of the ventromedial hypothalamus, not in the rest of the network. Because the effects of hormone treatment on neural responses are not identical in each region, the overall pattern of activation across the network changes with estradiol level and thus with season and breeding context. Our results demonstrate a possible mechanism by which gonadal steroids may alter the processing of social signals and affect social decision‐making. J. Comp. Neurol. 511:173–186, 2008. © 2008 Wiley‐Liss, Inc.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Géorgie (États-Unis)</li></region></list><tree><country name="États-Unis"><region name="Géorgie (États-Unis)"><name sortKey="Maney, Donna L" sort="Maney, Donna L" uniqKey="Maney D" first="Donna L." last="Maney">Donna L. Maney</name></region><name sortKey="Goode, Christopher T" sort="Goode, Christopher T" uniqKey="Goode C" first="Christopher T." last="Goode">Christopher T. Goode</name><name sortKey="Lange, Henry S" sort="Lange, Henry S" uniqKey="Lange H" first="Henry S." last="Lange">Henry S. Lange</name><name sortKey="Maney, Donna L" sort="Maney, Donna L" uniqKey="Maney D" first="Donna L." last="Maney">Donna L. Maney</name><name sortKey="Sanford, Sara E" sort="Sanford, Sara E" uniqKey="Sanford S" first="Sara E." last="Sanford">Sara E. Sanford</name><name sortKey="Solomon, Benjamin L" sort="Solomon, Benjamin L" uniqKey="Solomon B" first="Benjamin L." last="Solomon">Benjamin L. Solomon</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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