期刊
BIOLOGY LETTERS
卷 5, 期 1, 页码 117-121出版社
ROYAL SOC
DOI: 10.1098/rsbl.2008.0397
关键词
cortex; pallium; evolution; actinopterygian; teleost
A large skull is disadvantageous to animals that move quickly in three-dimensional space, such as fishes and birds in water or air. A cerebral neocortex with a six-layered sheet has not evolved, most likely due to the limited cranial space. Instead of the laminar cortex, telencephalic nuclear masses seem to have evolved as the pallium in teleost fishes. We consider that the nuclear masses contain rather simple neural circuits sharing a skeleton of simple circuits in the mammalian cortex, which have been elaborated by additional circuits in mammals. Such basic similarities at the connectional level shared by nuclear and cortical pallium might underlie similar or equivalent functions.
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