摘要
本文在电镜下观察了41例神经性疾病(遗传性12例、免疫球蛋白紊乱血症性8例、感染性8例、血管疾患性3例、其他3例、原因不明7例)病人腓浅神经足背支活检标本.发现10例的神经束膜中有小管存在。另观察了9例正常人外周神经,发现4例存在这种小管。出现神经束膜小管的占总例数的14/50(28%)。神经束膜小管系统可分为2级:1.由1～2层神经束膜细胞围成的神经束膜微管,管腔不规则;2.由1～3层神经束膜细胞围成的神经束膜小管,管腔较规则。神经束膜小管的外侧面有基膜。管腔内物质的密度很低,并可见糖原样颗粒和髓磷脂样物质。构成管壁的神经束膜细胞的吞饮小泡开口于管腔。神经束膜小管系统高度盘曲,位于各层神经束膜细胞之间,管腔直径约为0.1～2.7μm。小管起始部位位于神经束膜的最内层,并以含基膜样物质的神经束膜细胞间间隙和完整的基膜与神经束膜下间隙分隔;其末端终止部位还不清楚。
41 biopsies of rami cutaneous dorsalis of nerve peronaeus superficalis in neuro-pathies(12 inherited,8 dysglobulinemia,8 infective,3 vascular,3 other,7 unknown)and 9 biopsies from normal man were observed under electron microscope.It wasfound that 10 oud of the 4 biopsies(24%)oud 4 of the 9 biopsies(44%)had theperineurial canalicular system.The perineurial canalicular system can be divided into 2gradations.(1)The perineurial microcanaliculus consists of 1-2 layers of the perineurialcells,the lumen was irregular;(2)The perineurial canaliculus consists of 1-3 layers ofthe perineurial cells,the lumen was more regular.The luminal surface of the perineu-rial cells had no basal lamina but the external surface of them had basal lamina.The density in the luminal contents obviously lower than that of outside and glyc-ogen-like granules and myelin-like substance could be seen within the lumen.Pino-cytotic vesicles in the perineurial cells of the canalicular wall opened into the lum-inal surface.These canaliculi extraordinarily twisted between the perineurial cells ofvarious layers and the diameter of the lumen was generally 0.1-2.7μm.The originof the canaliculi situated in the inner layer of perineurium was separated from thesubperineurial space with complete basal lamina and intercellular space that contain-ed basal lamina-like substance between perineurial cells.Their termination was notknown yet.The role and function of the perineurial canalicular system were discuss-ed.
出处
《解剖学报》
CAS
CSCD
北大核心
1989年第3期278-281,共4页
Acta Anatomica Sinica
关键词
神经束膜
小管系统
人
神经系病
Perineurial canalicular system
Perineurium
Peripheral nerve
Ultrastructure
Human
