摘要
于21只猫之颈髓6、7或腰髓5、6内注射HRP,观察了后索核内标记细胞之分布及形态。投射至颈髓的细胞主要分布在闩以下2.5毫米至闩以上0.5毫米范围内;投射至腰髓者分布于闩以下2.5毫米范围内。在内、外侧方向上,至颈髓者主要位于薄、楔束核的交界部及内侧楔束核的腹内侧部,后索核的其余地区有散在的标记细胞。投射至腰髓者位置较偏内侧,主要位于薄楔束核的交界区及薄束核的腹外侧部,但在两核中也有一些散在的细胞。至颈、腰髓投射细胞区的不同符合有一定的体部定位关系,但两区彼此重叠。标记细胞的大小、形态差别很大,小细胞主要集中在薄、楔束之交界部,大多呈梭形。大细胞分散在核的其余部分,多呈三角形或多角形,具有少而直的树突,少数细胞呈圆形,其树突丛状。这种形态上的差别可能提示其在脊髓内终止方式及功能可能不同。
Horseradish peroxidase was injected into C_(6,7)or L_(5,6)spinal cord in 21 adult cats and the morphology and distribution of the labeled cells in the dorsal columu nuclei(DCN)were studied.Cells projecting to the cervical cord were found to be distributed mainly in a region from 2.5mm below to 0.5mm above the obex,while cells projecting to the lumbar cord were found within 2.5mm below the obex.Medio-Iaterally,the cervical projecting cells were located chiefly at the junctional area between the gracile and medial cuneate nuclei and at the ventromedial part of the latter.The lumbar projection cells were located more medially,concentrating at the junctional area and the ventrolateral part of the gracile nucleus.In both cases scattered cells were found in the two dorsal column nuclei.The difference in cellular distribution between cervical and lumbar injection cases is consistent with a somatotopical organization.The labeled cells in the dorsal column nuclei varied in shape and size.Small cells,mostly fusiform,were concentrated at the junctional area between the gracile and medial cuneate nuclei.Large cells were found scattered in the two nuclei.Many of them were triangular or multipolar with long and straight dendrites.A few were round and their dendrites bushy.
作者
鞠躬
Ju Gong(The Fourth Army Medical College)
出处
《解剖学报》
CAS
1981年第1期66-71,117,共7页
Acta Anatomica Sinica
