Schulz E, Müller S, Boldt A
Z Mikrosk Anat Forsch. 1980;94(4):641-60.
The dendritic tree and the spine distribution at layer III pyramidal cells of the cingulate cortex in three months old male rats were evaluated quantitatively with Golgi-Kopsch impregnated brains. The analysed pyramidal cells were classified into three groups as to different lengths of their apical main dendrites. The spine values for a basal individual dendritic field show significant differences between these three groups. The layer III pyramidal neurons of the cingulate cortex exhibit on an average a total length of the dendrites of 2253 micron with a total 1507 visible spines. The total average of spines on the apical main dendrites amounts to 0,57 spines per micron, the average length of the apical main dendrites amounts to 217 micron. The apical values of spine densities are smaller than that of the basal values. The basal dendritic tree is more branched and exhibit a higher total length of the dendritic branches than that of the apical dendritic tree. The apical and basal differences as to spine densities and lengths of the dendritic branches results in an equality as to the total number of apical and basal spines per neuron. The values of the cingulate layer III pyramidal cells are smaller by comparison with those of the striate area. These results are closely related to the number of afferent terminations in both regions.
用高尔基-科普希（Golgi-Kopsch）浸染的脑标本，对3月龄雄性大鼠扣带回皮质Ⅲ层锥体细胞的树突树和棘分布进行了定量评估。根据顶主树突的不同长度，将分析的锥体细胞分为三组。这三组之间单个基底树突野的棘值存在显著差异。扣带回皮质Ⅲ层锥体细胞的树突总长度平均为2253微米，共有1507个可见棘。顶主树突上棘的总平均值为每微米0.57个棘，顶主树突的平均长度为217微米。顶棘密度值小于基底棘密度值。基底树突树分支更多，其树突分支的总长度比顶树突树更长。顶树突和基底树突在棘密度和树突分支长度上的差异导致每个神经元顶棘和基底棘的总数相等。与纹状区相比，扣带回Ⅲ层锥体细胞的值较小。这些结果与两个区域传入终末的数量密切相关。
