A new interpretation on the homology of the teleostean telencephalon based on hodology and a new eversion model

Naoyuki Yamamoto
Yuji Ishikawa
Masami Yoshimoto
Hao-Gang Xue
Nurmamat Bahaxar
Nobuhiko Sawai
Chun-Ying Yang
Hitoshi Ozawa
Hironobu Ito

Various hypotheses regarding the homology of the teleostean telencephalon with that of other vertebrates have been proposed to date. However
 a firm conclusion on this issue has yet to be drawn. We propose here a new hypothesis with a new eversion model. Our hodological data and the analysis of dorsal telencephalic organization in adult cyprinids suggest that: (1) the area dorsalis pars posterior corresponds to the lateral pallium (2) ventral region of area dorsalis pars lateralis to the medial pallium (3) pars medialis
 dorsal region of pars lateralis
 pars dorsalis
 and pars centralis of the area dorsalis to the dorsal pallium
 and (4) nucleus taenia to the ventral pallium. We propose in a three dimensional model that the eversion process occurs not only dorsolaterally but also caudolaterally. We consider that the caudally directed component dominates for ventral zones of the pallium
 or the lateral and ventral pallia and the periventricular surface of these zones shift caudally
 laterally
 and then rostrally in teleosts with pronounced telencephalic eversion. This new model fits well with the putative homology based on hodology and the organization of telencephalic divisions in the adult brain. Copyright c 2007 S. Karger AG.

Brain
 Behavior and Evolution

69

2

10.1159/000095198

https://doi.org/10.1159/000095198
https://www.ncbi.nlm.nih.gov/pubmed/17230017