Grzibiela G, Jersch W
J Hirnforsch. 1975;16(5):415-38.
The change of the number of neurons, of the freshvolume, of the density of neurons, of the relative volume (freshvolume of hypoglossal nucleus/freshvolume of the whole brain) and of the length of the hypoglossal nucleus of 30 male Tupaia belangeri aged 36 to 388 days of ontogenesis has been studied using the logistic function (see article) for increasing values and the exponential function (see article) for decreasing values. The number of neurons is decreasing at 36 days of ontogenesis from 5700 to 5150 on the adult level, the density of neurons from 30000 N/mm3 to 6000 N/mm3 and the relative volume from 0,8% to 0,26%. The freshvolume is increasing from 0,31 mm3 on birth to 0,92 mm3 on the adult level and the length from 1,74 mm to 2,41 mm. The development of hypoglossal nucleus of Tupaia belangeri during ontogenesis starts very early in comparison with the whole brain. The half-value time of the growth of freshvolume is 53 days of ontogenesis and that of the growth of length is 34 days of ontogenesis. The maximum of spontaneous cell loss, stated here too for the hypoglossal nucleus, probably lies before the 36th day of ontogenesis. The decrease of the relative volume during ontogenesis is a further characteristic fact of the very early start of the development of hypoglossal nucleus of Tupaia belangeri during ontogenesis.
研究了30只年龄在个体发育36至388天的雄性树鼩，其舌下神经核的神经元数量、新鲜体积、神经元密度、相对体积（舌下神经核新鲜体积/全脑新鲜体积）和舌下神经核长度的变化。使用逻辑函数（见文章）处理增加的值，指数函数（见文章）处理减少的值。在个体发育36天时，神经元数量从成年水平的5700个减少到5150个，神经元密度从30000N/mm³减少到6000N/mm³，相对体积从0.8%减少到0.26%。新鲜体积从出生时的0.31mm³增加到成年水平的0.92mm³，长度从1.74mm增加到2.41mm。与全脑相比，树鼩舌下神经核在个体发育过程中的发育开始得非常早。新鲜体积增长的半衰期是个体发育的53天，长度增长的半衰期是个体发育的34天。这里提到的舌下神经核自发细胞损失的最大值可能在个体发育的第36天之前。个体发育过程中相对体积的减少是树鼩舌下神经核在个体发育过程中非常早开始发育的另一个特征性事实。
