Platel R
J Hirnforsch. 1976;17(6):513-37.
The volumetric measure of the main subdivisions of the brain has been carried out on 32 species of Lizards and 3 species of Snakes. The analysis of the allometrical relations between the volume (the weight) of these subdivisions and the body weight shows firstly that the evolutionary or/and adaptative processes are only located at the mesencephalic and metencephalic levels. A more elaborate study leads meanwhile to the conclusion that anothers brain structures - pallium, basal areas, dorsal thalamus - are also implicated, according to the possibility to group the various species into taxomic units (such as family) or in another way; thus it has been possible to corroborate with quantitative datas the NORTHCUTT'S definition (1972) of the Type I (Lacertomorpha) and Type II (Dracomorpha) lizards; the Dracomorpha show "dynamical" structures - pallium and dorsal thalamus - and remind, in some degree the mammal organization. Each structure in each species can be expressed by the way of a relation index; like the encephalization index, the referrence is given by the 6 Lacertidae of the sample. The analysis of these indices is carried according to the legless condition, tree-dwelling life, vision performance and the various possibilities to group the species (taxonomic units such as family or another else); the comparison of the various indices corroborates the pecularities of the Lacertomorpha on the one hand and of the Dracomorpha on the other hand. The isoponderal percentages are calculated taking into account the allometrical relations and thus are better than the relative volumes commonly used. They lead to results previously expressed by the various relation indices. The comparison between Lizards and Snakes leads to the following conclusions: Snakes are less different among themselves than the Lizards, but the species of modern type (Caenophidia) are more telencephalized; they show a proper brain organization; meanwhile the legless condition is expressed, like in the so-called lizards, by a reduced cerebellar volume.
对32种蜥蜴和3种蛇的大脑主要亚区进行了体积测量。对这些亚区的体积（重量）与体重之间的异速生长关系分析表明，首先进化或/和适应性过程仅发生在中脑和后脑水平。同时，更详尽的研究得出结论，根据将不同物种分组为分类单元（如科）或以其他方式分组的可能性，其他脑结构——大脑皮层、基底区域、背侧丘脑——也有涉及；因此，有可能用定量数据证实诺思卡特（1972年）对I型（蜥蜴亚目）和II型（蛇蜥亚目）蜥蜴的定义；蛇蜥亚目显示出“动态”结构——大脑皮层和背侧丘脑——在某种程度上类似于哺乳动物的组织。每个物种中的每个结构都可以用一个关系指数来表示；就像脑化指数一样，参考样本是6种蜥蜴科动物。根据无腿状态、树栖生活、视觉表现以及将物种分组的各种可能性（如科等分类单元或其他方式）对这些指数进行分析；对各种指数的比较一方面证实了蜥蜴亚目的特性，另一方面证实了蛇蜥亚目的特性。考虑到异速生长关系计算了等重百分比，因此比常用的相对体积更好。它们得出了先前由各种关系指数所表达的结果。蜥蜴和蛇之间的比较得出以下结论：蛇之间的差异比蜥蜴小，但现代类型（新蛇亚目）的物种脑化程度更高；它们表现出独特的脑组织结构；同时，无腿状态与所谓的蜥蜴一样，表现为小脑体积减小。
