Beal J A, Nandi K N, Knight D S
Department of Cellular Biology and Anatomy, LSU Medical Center, Shreveport 71130-3932.
Exp Brain Res. 1990;83(1):225-7. doi: 10.1007/BF00232213.
Two types of neurons were observed in the substantia gelatinosa (SG) of the rat spinal cord which exhibit wide variations in dendritic symmetry. As demonstrated with the Golgi technique, "islet" cells with short dendritic arbors and "type III stalk" cells display dendritic patterns which vary from a bipolar type arrangement with two dendritic arbors of nearly equal dimensions to a unipolar arrangement with a dendritic arbor which extends in only one direction. Examination of the morphology and dendritic development of these neurons shows that they are unique compared with other SG neurons in that they have short, longitudinal dendritic arbors which undergo maturation relatively late in the postnatal period. As is discussed, variations in dendritic symmetry are probably dependent on the location of the terminal fields of primary and/or other types of afferents which are formed earlier in development.
在大鼠脊髓的胶状质（SG）中观察到两种类型的神经元，它们的树突对称性存在很大差异。用高尔基技术显示，具有短树突分支的“胰岛”细胞和“III型柄”细胞呈现出从具有两个几乎等大的树突分支的双极型排列到仅向一个方向延伸的树突分支的单极型排列的树突模式。对这些神经元的形态和树突发育的检查表明，与其他SG神经元相比，它们是独特的，因为它们具有短的纵向树突分支，这些树突分支在出生后相对较晚才成熟。如所讨论的，树突对称性的变化可能取决于在发育早期形成的初级和/或其他类型传入纤维的终末场的位置。
