红嘴相思鸟雏鸟间脑动眼神经核团的组织结构?

本研究旨在探讨红嘴相思鸟（Leiothrix lutea）雏鸟间脑动眼神经核团的发育动态变化。采用甲苯胺蓝法染色，光镜下观察1、5和9日龄红嘴相思鸟雏鸟间脑动眼神经核的组织学结构。结果显示，红嘴相思鸟雏鸟间脑从浅层至深层依次排列有背外侧部、背内侧部、腹侧部3个亚核以及动眼神经副核。各核团亚区均主要由小型和大型细胞构成，但是不同亚区大型和小型细胞数量、比例以及分布存在差异。随日龄增长，神经细胞内尼氏体逐渐增多。从1日龄到9日龄，各核团之间相对位置不变，但间距增大，且各核团横切面面积显著增大（P < 0.05或P < 0.01）。结果表明，随着红嘴相思鸟雏鸟日龄增长，间脑动眼神经核结构逐渐发育成熟，与其眼部肌肉运动的调控能力渐趋完善相适应。

Histological Observation on the Diencephalic Oculomotor Nucleus in Leiothrix lutea Nestling

The purpose of this study was to investigate the developmental dynamic changes in histological structure of diencephalic oculomotor nucleus in Leiothrix lutea nestling at different days of age. The microstructure of diencephalic oculomotor nucleus at one, five and nine days after hatching were observed and a special staining method-toluidine blue staining (TBS) was employed. The significance among different ages was analyzed by one-way analysis of variance analysis, and results were presented as mean ± standard deviation (Mean ± SD). The analysis was conducted using SPSS 16.0 for windows. The results suggested that there were four parts of nuclei, namely nucleus nervioculomotorii pars dorsolateralis (OMdl), nucleus nervi oculomotorri pars dorsomedialis (OMdm), nucleus nervioculomotorii pars ventralis (OMv) and nucleus of edinger-westphal (EW) (as shown in Table 1 and Fig. 1). Oculomotor nucleus of L. lutea nestling was comprised of small and large types of nerve cells, but the population, proportion and distribution of the two types of cells in different sub-regions were different as the days go by, and intracytoplasmic nissl bodies increased gradually with growth. There was no significant change in the relative position between different cerebellar nuclei, but both the interval and sectional area were increased from the age of 1 to 9 days (Fig. 2, 3 and 4). The results show that the structure of oculomotor nucleus matures with the growth of the L. lutea nestling, which is in accordance with its gradually improved neuroregulation of eye muscles.