Popovich T V, Polenov A L
Arkh Anat Gistol Embriol. 1976 Mar;70(3):104-10.
Under study was the structure of the hypothalamo-hypophyseal neurosecretory system in two species of lemmings of the Wrangel island: the collared lemming, (Dicrostonyx torquatus) and the Ob lemming (Lemmus sibiricus). Inspite of the similarity in the general organization of this system in all rodents, certain species features were found in the topography of neurosecretory elements in the animals studied. In the Ob lemming there is a great similarity in the structures of the neurosecretory system with the albino rat than in the collared lemming. In both species of lemmings, and in the collared lemming in particular, the supraoptic nucleus is located more dorso-caudally and the paraventricular one-more dorsally. A greater amount of neurosecretory cells is found which from additional groups. The hypothalamo-hypophyseal and extrahypothalamic pathways are well pronounced. The postoptical nucleus is considerably developed. In the collared lemming it is almost equal to the supraoptic one in the amount of cells composing it. The ratio of the cells in the supraoptic and postoptic nuclei is suggested to be related to the level of the water-salt metabolism and the specific ecology of lemmings.
对弗兰格尔岛上两种旅鼠——领旅鼠（Dicrostonyx torquatus）和鄂毕旅鼠（Lemmus sibiricus）的下丘脑 - 垂体神经分泌系统结构进行了研究。尽管在所有啮齿动物中该系统的总体组织相似，但在所研究的动物中，神经分泌元件的地形学上发现了某些物种特征。鄂毕旅鼠的神经分泌系统结构与白化大鼠的相似性比领旅鼠更高。在这两种旅鼠中，尤其是领旅鼠，视上核位于更靠背侧和尾侧，室旁核位于更靠背侧。发现有更多的神经分泌细胞形成额外的群体。下丘脑 - 垂体和下丘脑外途径很明显。视后核相当发达。在领旅鼠中，其组成细胞数量几乎与视上核相等。视上核和视后核中的细胞比例被认为与水盐代谢水平和旅鼠的特定生态有关。
