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首页> 外文期刊>Brain research >Sexual dimorphism in the vomeronasal system of the rabbit.
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Sexual dimorphism in the vomeronasal system of the rabbit.

机译：兔子的犁鼻系统中的性二态性。

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Studies have shown that the vomeronasal system (VNS), an olfactory neural network that participates in the control of reproductive physiology and behavior, is sexually dimorphic in the rat. These works have also shown two main characteristics of brain sexual dimorphism: (a) dimorphism appears in neural networks related to reproduction and (b) it can present two morphological patterns: one in which males present greater morphological measures than females (male > female) and another in which the opposite is true (female > male). The present work extends the hypothesis to the rabbit, as a representative species of Lagomorpha. In addition, the locus coeruleus (LC), which is known to send rich noradrenergic projections to VNS structures, was also studied. Sex differences were found in: (a) the number of mitral, and dark and light granule cells (female > male) of the accessory olfactory bulb (AOB); (b) the medial amygdala (Me) and its dorsal (Med) and ventral (Mev) subdivisions, males showing greater valuesthan females in volume and number of neurons, while in the posteromedial cortical amygdala (PMCo or C(3)), females show greater density of neurons than males and (c) the posteromedial division of the bed nucleus of the stria terminalis (BSTMP) in which males have more neurons than females. No sex differences were seen in the bed nucleus of the accessory olfactory tract (BAOT) and the LC. These results evidence that, as it was observed in rodents, sex differences are also seen in the VNS of Lagomorpha and that these sex differences present the two morphological patterns seen in Rodentia. Differences between orders are discussed with respect to the species-specific physiological and behavioral peculiarities.
机译：研究表明，犁鼻鼻系统（VNS）是一种嗅觉神经网络，参与生殖生理和行为的控制，在大鼠中是性二态的。这些作品还显示了大脑性二态性的两个主要特征：（a）二态性出现在与生殖相关的神经网络中;（b）它可以呈现两种形态学模式：一种形态是雄性比雌性表现出更大的形态学指标（雄性>雌性）另一种情况相反（女性>男性）。本工作将假说扩展到了兔，作为兔形目的代表种。此外，还研究了已知的蓝斑轨迹（LC），它可以向VNS结构发送丰富的去甲肾上腺素能投影。在以下方面发现了性别差异：（a）副嗅球（AOB）的二尖，暗和亮颗粒细胞的数量（雌性>雄性）; （b）内侧杏仁核（Me）及其背侧（Med）和腹侧（Mev）细分，在神经元的体积和数量上，男性表现出比女性更大的价值，而在后内侧皮质杏仁核（PMCo或C（3））中，女性显示出比男性更大的神经元密度;（c）纹状体床核（BSTMP）的后内膜分裂，其中男性比女性多。在副嗅道（BAOT）和LC的床核中未发现性别差异。这些结果证明，正如在啮齿动物中观察到的那样，在Lagomorpha的VNS中也观察到性别差异，并且这些性别差异呈现出在啮齿类动物中观察到的两种形态学模式。关于物种特定的生理和行为特点，讨论了顺序之间的差异。

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