摘要
用尼氏染色及Haggqvist染色法观察了 2 4例孵育 3～ 6 2天的扬子鳄胚胎的脊髓胸段组织发生过程 .孵育第 3天 ,脊髓横断面近圆形 ,中央管呈长椭圆形 .第 6天脊髓呈卵圆形 ,中央管呈窄而长的梭形 ,套层明显 .第 12天 ,脊髓灰质的腹角明显 ,脊髓外周出现一薄层白质 .第 18～ 30天中 ,灰质腹角进一步扩大 ,背角逐渐形成 .两侧背角不断向正中靠拢并合并 ,中央管缩小呈圆形 .白质明显增厚并形成背索、侧索和腹索 .第 30～ 6 2天中 ,两侧灰质腹角亦向中央靠拢 ,腹正中沟显著加深 ,腹角及背角中的神经元逐步分化成熟 .
Histogenesis of thoracic spinal cord of alligator sinensis was observed with Nissl and Haggqvist staining based upon 24 embryos aged from 3rd-62nd incubation day. At 3rd day of incubation, the transection of spinal cord was nearly round in shape, and the central canal, long elliptic. At 6th day, the spinal cord was ellipse-shaped, and the central canal, narrow and long shuttle-shaped. The mantle layer of spinal cord was visible. At 12nd day of incubation, the ventral horn of gray matter was visible, and a thin layer of white matter appeared around the spinal cord. During 18-30th days of incubation, the ventral horn of gray matter further enlarged, and the dorsal horn formed gradually. The central canal was narrowed to be round in shape because both sides of dorsal horns closed gradually toward the median line and merged. The white matter, which formed dorsal, lateral and ventral funiculi was now clearly got thich. During 30th-62nd day of incubation, the ventral median fissure deepened distinctly because both sides of ventral horns also closed toward the median. Neurons at the ventral and dorsal horns differentiated gradually and matured.
出处
《安徽师范大学学报（自然科学版）》
CAS
2000年第3期234-237,共4页
Journal of Anhui Normal University(Natural Science)
基金
安徽省自然科学基金资助课题!( 982 41716)
