THE CONNECTIONS BETWEEN THE SPINAL GRAY AND THE DORSAL COLUMN NUCLEI——Ⅰ. DISTRIBUTION OF THE DORSAL COLUMN NUCLEISPINAL PROJECTION CELLS. A RETROGRADE HORSERADISH PEROXIDASE STUDY
- VernacularTitle:脊髓灰质与后索核的联系——Ⅰ.后索核-脊髓投射细胞的分布.辣根过氧化物酶逆行法研究
- Author:
Gong JU
- Publication Type:Journal Article
- From:
Acta Anatomica Sinica
1953;0(01):-
- CountryChina
- Language:Chinese
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Abstract:
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.
