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首页> 外文期刊>The European Journal of Neuroscience >Segregated pathways to the vomeronasal amygdala: differential projections from the anterior and posterior divisions of the accessory olfactory bulb.
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Segregated pathways to the vomeronasal amygdala: differential projections from the anterior and posterior divisions of the accessory olfactory bulb.

机译：到达犁鼻前杏仁核的途径分离：从嗅球的前部和后部的差异投影。

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摘要

Apically and basally located receptor neurons in the vomeronasal sensory epithelium express G(i2alpha)- and G(oalpha)-proteins, V1R and V2R vomeronasal receptors, project to the anterior and posterior accessory olfactory bulb and respond to different stimuli, respectively. The extent to which secondary projections from the two portions of the accessory olfactory bulb are convergent in the vomeronasal amygdala is controversial. This issue is addressed by using anterograde and retrograde tract-tracing methods in rats including electron microscopy. Injections of dextran-amines, Fluoro Gold, cholera toxin-B subunit and Fast Blue were delivered to the anterior and posterior accessory olfactory bulb, bed nucleus of the stria terminalis, dorsal anterior amygdala and bed nucleus of the accessory olfactory tract/anteroventral medial amygdaloid nucleus. We have demonstrated that, apart from common vomeronasal-recipient areas, only the anterior accessory olfactory bulb projects to the bed nucleus of the stria terminalis, medial division, posteromedial part, and only the posterior accessory olfactory bulb projects to the dorsal anterior amygdala and deep cell layers of the bed nucleus of the accessory olfactory tract and the anteroventral medial amygdaloid nucleus. These results provide evidence that, excluding areas of convergence, the V1R and V2R vomeronasal pathways project to specific areas of the amygdala. These two vomeronasal subsystems are therefore anatomically and functionally separated in the telencephalon.
机译：犁鼻感觉上皮中位于根尖和基端的受体神经元表达G（i2α）和G（oalpha）蛋白，V1R和V2R犁鼻受体，分别投射到前，后副嗅球并分别响应不同的刺激。来自副嗅球的两个部分的二次突起在犁鼻杏仁核中会聚的程度是有争议的。通过在大鼠中使用顺行和逆行道追踪方法（包括电子显微镜）解决了这个问题。右旋糖胺，氟金，霍乱毒素-B亚基和坚牢蓝的注射液被输送到前，后副嗅球，终末纹的床核，背侧杏仁核和副嗅道/腹膜内侧杏仁核的床核。核。我们已经证明，除了常见的犁鼻-受体区域外，仅前副嗅球突出到终末纹，中部，后内侧部分的床核，并且仅后副嗅球突出到背杏仁前和深部嗅觉床核和前腹内侧杏仁核的细胞层。这些结果提供了证据，除会聚区域外，V1R和V2R犁鼻途径投射到杏仁核的特定区域。因此，这两个犁鼻子系统在端脑中在解剖上和功能上是分开的。

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