| 老年大鼠垂体神经叶分泌纤维的电镜观察 |
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| 引用本文： | 袁德霞,刘锋.老年大鼠垂体神经叶分泌纤维的电镜观察[J].解剖学杂志,1994,17(1):33-36. |
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| 作者姓名： | 袁德霞 刘锋 |
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| 作者单位： | 河北医学院解剖教研室，河北医学院解剖教研室，河北医学院组胚教研室 石家庄050017，石家庄050017，石家庄050017 |
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| 摘 要： | 透射电镜观察青年组（３－６月）和老年组（１８－３０月）雄性大鼠的垂体神经叶，发现老年大鼠的神经膨大中神经分泌颗粒随增龄减少显著，而分散的微泡和空泡相对较多。退化，变性的神经膨大增多。轴－轴突触样结构缺乏。细胞间隙增宽。根据超微结构特征将神经膨大划分五型，并型神经膨大的随龄变化进行讨论。
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| 关 键 词： | 神经分泌纤维 神经膨大 微泡 衰老 |
ELECTRON MICROSCOPIC OBSERVATION OF NEUROSECRETORY FIBRES OF HYPOPHYSEAL NEURAL LOBES IN AGED RATS |
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| Liu Feng,Fu Zhiliang,Yuan Dexia.ELECTRON MICROSCOPIC OBSERVATION OF NEUROSECRETORY FIBRES OF HYPOPHYSEAL NEURAL LOBES IN AGED RATS[J].Chinese Journal of Anatomy,1994,17(1):33-36. |
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| Authors: | Liu Feng Fu Zhiliang Yuan Dexia |
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| Institution: | Liu Feng,Fu Zhiliang,Yuan DexiaDepartment of Anatomy,Department of Histology and Embryology,Hebei Medical College,Shijiazhuang 050017 |
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| Abstract: | The hypophyseal neural lobes of young adult (3-6 months) and aged (18-30 months) male Wistar rats were observed with TEM. The principal findings were as follows: neurosecretory gran-ules (NSG) decreased significantly with age in the nerve swellings of senescent rats and increased in their dispersed microvesicles and vesicles. There was a significant increase of degenerated and deteriorated swellings and lack of synaptic contacts among the axon terminals. The intercellular space around the nerve swellings expanded in the process of aging. In this paper we classify nerve swellings of the hypophyseal neural lobes into five types according to their different ultrastructural features and discuss their changes with age. |
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| Keywords: | neurosecretory fibre: nerve swelling microvesicles aging |
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