Gonadal hormones modulate the display of conditioned defeat in male Syrian hamsters
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چکیده
منابع مشابه
Gonadal hormones modulate the display of submissive behavior in socially defeated female Syrian hamsters.
There are striking differences in the behavioral response to social defeat between male and female Syrian hamsters. Whereas males exhibit a prolonged behavioral response to defeat (i.e., conditioned defeat), many females remain aggressive or show only a transient submissive response following defeat. The current study tested the hypothesis that sex steroids underlie this differential behavioral...
متن کاملIs the medial amygdala part of the neural circuit modulating conditioned defeat in Syrian hamsters?
Conditioned defeat is a model wherein hamsters that have previously experienced a single social defeat subsequently exhibit heightened levels of avoidance and submission in response to a smaller, non-aggressive intruder. While we have previously demonstrated the critical involvement of the basolateral and central nuclei of the amygdala in the acquisition and expression of conditioned defeat, th...
متن کاملSocial defeat and footshock increase body mass and adiposity in male Syrian hamsters.
Obesity is a world-wide epidemic, and many factors, including stress, have been linked to this growing trend. After social stress (i.e., defeat), subordinate laboratory rats and most laboratory mice become hypophagic and, subsequently, lose body mass; the opposite is true of subordinate Syrian hamsters. After social defeat, Syrian hamsters become hyperphagic and gain body mass compared with non...
متن کاملCopulatory and agonistic behavior in Syrian hamsters following social defeat.
Syrian hamsters are highly aggressive animals that reliably defend their home territory. After social defeat, however, hamsters no longer defend their home cage but instead display submissive and defensive behavior toward an intruder, a response that we have termed conditioned defeat. Plasma testosterone is significantly reduced in Syrian hamsters following repeated defeat suggesting that socia...
متن کاملGABAA receptor activation in the lateral septum reduces the expression of conditioned defeat and increases aggression in Syrian hamsters.
Exposure to social stressors can cause profound changes in an individual's physiology and behavior. In Syrian hamsters, even a single social defeat results in conditioned defeat, which includes an abolishment of territorial aggression and the emergence of high levels of submissive behavior. The purpose of the current study was to determine whether the lateral septum (LS) is a component of the p...
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ژورنال
عنوان ژورنال: Hormones and Behavior
سال: 2009
ISSN: 0018-506X
DOI: 10.1016/j.yhbeh.2009.07.011