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STUDIES ON ANATOMY OF THE SPINAL CORD AND HISTOLOGY OF C6,T8, Lc2 OF THE INDO-PACIFIC HUMP-BACKED DOLPHIN

WU Baosun,ZHOU Kaiya,CAO Yuqing   

  • Online:2006-06-22 Published:2008-07-07

中华白海豚脊髓的解剖学和C6、T8、Lc2的组织学研究

吴葆孙,周开亚,曹玉清   

  1. 南京师范大学生物系 , 南京

Abstract: The spinal cord of an adult female of Indo-Pacific hump-backed dolphin Sousa chinensis ) were studied macro- and microscopically. Samples for microscopic observations were taken from C6, T8 and Lc2, frozen sections of 20~40μm thick were stained with 1% thionine or argyrophil method. The spinal cord formula was C8-T12-L10-Ca4 (or Lc14). The length of the spinal cord was 27.48% of the bodylength and the weight of the spinal cord was 3.88% of the brain weight. The arachnoid trabeculae were extremely developed and assumed thin silk floss. The pia mater brought blood vessels invaginated along with furrows and crevices into thespinal cord proper. Irregular periphery spaces of vessels containing lymphocytesand cerebral fluid were observed in the gray matter and white matter. The nervecells and capillaries were immersed in the cerebral fluid and therefore the formerwere refered to cerebrospinal fluid-containing neurons. The gray matter of C6, T8and Lc2 was divided into 10 layers according to the Rexed's Principle of the laminarcytoarchitecture pattern of the spinal cord. The cytoarchitecture of each of the layers and the corresponding nucleus were described. Special cell groups, i. e. lateral cervical nucleus, lateral thoracic nucleus and lateral lumbocaudal nucleus in the lateral funicle, dorsal funiculus nucleus in the dorsal funicle, scattered cells in the ventral funicle, were observed in the white matter.

Key words: Indo-Pacific hump-backed dolphin(Sousa chinensis), Spinal cord, Cytoarchitecture, Dorsal funiculus nucleus

摘要: 对1头雌成体中华白海豚的脊髓从宏观到微观研究其形态结构。光镜观察标本取自C6 、T8 和 Lc2, 冰切20~40μm, 硫堇及镀银两法染色。脊髓式为 C8-T12-L10-Ca4 (或 Lc14)。脊髓长占体长的27.48 %, 脊髓重占脑重的3.88%。蛛网膜小梁异常发达呈薄丝绵状, 软脊膜携血管随沟、裂内陷入脊髓实质。灰、白质具不规则血管周隙, 含淋巴细胞及脑脊液。神经细胞与微血管浸于脑脊液中, 故神经细胞为CSF-CN。根据 Rexed 的细胞构筑原则, 可将C6、T8、Lc2灰质分为10层, 并对每层及其相关神经核关系作了描述。在上述3节白质侧索、背索和腹索中均发现特殊细胞群, 即: 颈外侧核、胸外侧核和腰尾外侧核; 背索核和腹索中的弥散性细胞。

关键词: 中华白海豚, 脊髓, 细胞构筑, 背索核