摘要
将辣根过氧化物酶（ＨＲＰ）分别注入家兔脊髓单侧颈、胸、腰等不同节段，以显示皮质脊髓束投射神经元的分布。结果表明，大脑皮质的ＨＲＰ标记神经元仅见于颈段注入例，而胸段和腰段注入例未见到皮质标记神经元。标记的皮质脊髓束投射神经元主要分布于注入侧对侧的额叶无颗粒型皮质和顶叶颗粒型皮质，并呈现为３个分隔的标记细胞密集区，分别位于额叶皮质吻侧端的内侧部、邻近前因的额顶叶皮质、顶叶皮质的外侧部。标记神经元呈柱状排列分布于皮质的第Ⅴ层；胞体直径为１２～５３ｍ，大的标记神经元见于额叶皮质内侧部，而顶叶皮质外侧部的标记神经元较小。
he distribution of the corticospinal projection neurons in the cerebral cortex was stud-ied Ly using retrograde transport of HRP in the rabbit. The cervical, thoracic and lumbarsegments of the spinal cord were injected The results showed that the labeled neurons in thecerebral cortex could only be seen in those cases which were cervically injected. No labeledneurons were observed in those cases injected in the thoratic or lumbar segments of thespinal cord. The labeled corticospinal projtction neurons were distributed mainly in thefrontal agranular and the parietal cortex and dersely packed in three areas of contralateralside. The neurons , respectively, werr located in the rostromedial part of the frontal cortex,both frontal and parietal cortex adjacent tc bregma, and lateral part of the parietal cortexThese netrons werr presented only in layer V and had a columnal organization. The large la-beled neurons were medially located in the frontal cortex and the small neurons laterally intht parietal area.
出处
《解剖学报》
CAS
CSCD
北大核心
1994年第1期13-17,T002,共6页
Acta Anatomica Sinica
关键词
大脑皮质
神经元
脊髓
过氧化物酶
Cerebral cortex
Corticospinal projection neurons
Corticospinal tract
Spinal cord
HRP
Retrograde tract tracing
Rabbit
