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首页> 外文期刊>Journal of Neurophysiology >Comparative morphology of rodent vestibular periphery. I. Saccular and utricular maculae.
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Comparative morphology of rodent vestibular periphery. I. Saccular and utricular maculae.

机译：啮齿动物前庭周围的比较形态。 I.眼球黄斑和黄斑。

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Calyx afferents, a group of morphologically and physiologically distinct afferent fibers innervating the striolar region of vestibular sensory epithelia, are selectively labeled by antibodies to the calcium-binding protein calretinin. In this study, the population of calretinin-stained calyx afferents was used to delineate and quantify the striolar region in six rodent species: mouse, rat, gerbil, guinea pig, chinchilla, and tree squirrel. Morphometric studies and hair cell and calyx afferent counts were done. Numbers of hair cells, area, length, and width of the sensory epithelium increase from mouse to tree squirrel. In the mouse and rat, calretinin is found in 5-9% of all type I hair cells, 20-40% of striolar type II hair cells, and 70-80% of extrastriolar type II hair cells. Numbers of calyx afferents increase from mouse to squirrel, with more complex calyx afferents in larger species. About 10% of calyx afferents are branched. Based on our counts of total numbers of calyx afferents in chinchilla maculae and in comparison to fiber counts in the literature, the proportion of calyx afferents is greater than previously described, constituting nearly 20% of the total. Because morphometric measures increase with body weight, we obtained additional data on vestibular end organ surface areas from the literature and used this to construct a power law function describing this relationship. The function holds for species with body weights less than approximately 4 kg. Greater than 4 kg, the surface area of the sensory epithelia remains constant even with increasing body weight.
机译：花萼传入，一组形态和生理上不同的传入纤维，支配前庭感觉上皮的纹状体区域，由钙结合蛋白钙黄蛋白的抗体选择性标记。在这项研究中，使用钙网蛋白染色的花萼传入种群来描述和定量六种啮齿类动物的鼠毛区域：小鼠，大鼠，沙鼠，豚鼠，黄鼠和树松鼠。进行形态计量学研究以及毛细胞和花萼传入计数。从小鼠到松鼠，毛细胞的数量，感觉上皮的面积，长度和宽度都会增加。在小鼠和大鼠中，钙调蛋白存在于所有I型毛细胞的5-9％，II型毛细血管的毛发的20-40％和II型毛细血管外的毛发的70-80％。从老鼠到松鼠的花萼传入的数量增加，在较大的物种中花萼传入的复杂性更高。大约10％的花萼传入分支。根据我们对黄鼠黄斑区花萼传入总数的计数，并与文献中的纤维计数相比，花萼传入的比例比以前描述的要大，占总数的近20％。由于形态测量随着体重的增加而增加，因此我们从文献中获得了前庭终末器官表面积的更多数据，并以此构建了描述该关系的幂律函数。该功能适用​​于体重小于约4 kg的物种。大于4千克时，即使体重增加，感觉上皮的表面积也保持恒定。

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