A COMPARATIVE STUDY OF THE THREE-DIMENSIONAL STRUCTURE OF THE NUCLEUS ISTHMI IN FROG AND LIZARD / 解剖学报

ABSTRACT

According to the principle of shading, the nucleus isthmi (NI) from the frog (Rana nigromaculata) and lizard (Gekko gekko) were reconstructed in three-dimensions by using a microcomputer system. The dimensions and volume of NI in the two species were measured. A comparison of the three-dimensional structure of NI from the frog, lizard and pigeon indicates that the more advancedis is the species of lower vertebrates in evolution, the more complex is the three-dimensional structure of their NI.