Medial Amygdala Involvement in Discrimination of Same-Species and Closely-Related-Species Male Stimuli in Estrous Female Mesocricetus Hamsters
Medial Amygdala Involvement in Discrimination of Same-Species and Closely-Related-Species Male Stimuli in Estrous Female Mesocricetus Hamsters
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DOI：
10.1037/a0016439
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发表时间：
2009-08-01
影响因子：
1.9
通讯作者：
Johnston, Robert E.
中科院分区：
文献类型：
--
作者：
delBarco-Trillo, Javier;Gulewicz, Kara;Johnston, Robert E.
近缘种个体间的有效区分对于最大限度地发挥生殖潜能至关重要。一些以雄性为研究对象的研究表明，内侧杏仁核（MeA）参与了同种雌性和远亲物种雌性的气味识别。作者研究了MeA在雌性对同种雄性和近缘种雄性气味的辨别中所起的作用。作者将雌性仓鼠（Mesocricetus auratus）暴露于生理盐水、同种雄性气味或异种雄性气味中，并量化了其前后MeA中c-fos相关抗原的表达。他们发现，发情（但不是发情）的雌性对同种雄性气味的调查时间长于异种雄性气味。发情期雌鼠前后侧的神经活动均高于发情期雌鼠。在前MeA中，同种雄性和异种雄性对气味的反应没有显著差异。然而，在后MeA，发情的雌性暴露于同种气味时的神经活动高于暴露于异种气味时的神经活动。在雌性中没有观察到这种差异。
Efficient discrimination between individuals of closely related species is important to maximize reproductive potential. Some studies using males as subjects have indicated that the medial amygdala (MeA) is involved in discrimination between odors of conspecific females and females from distantly related species. The authors investigated the involvement of the MeA in discrimination by females between odors of conspecific males and odors of males of a closely related species. The authors exposed estrous or diestrous female hamsters (Mesocricetus auratus) to saline, conspecific male odors, or heterospecific (M. brandti) male odors and quantified the expression of c-fos-related antigens in the anterior and posterior MeA. They found that estrous (but not diestrous) females investigated conspecific male odors longer than heterospecific male odors. Neural activity in both the anterior and the posterior MeA was higher in estrous than in diestrous females. In the anterior MeA, there were no significant differences in response to odors of conspecific and heterospecific males. In the posterior MeA, however, neural activity was higher when estrous females were exposed to conspecific odors than when they were exposed to heterospecific odors. No such difference was observed in diestrous females.