Understanding the basic circuitry of the cerebral hemispheres: the case of lizards and its implications in the evolution of the telencephalon

Brain Research Bulletin
E LanuzaFernando Martínez-García

Abstract

The organization of the cerebral hemispheres of mammals is characterized by corticostriatal glutamatergic projections and striatopallidal GABAergic ones, plus the descending projections of the pallium and subpallium to extratelencephalic targets. The present review of the available neuroanatomical data on the forebrain of lizards suggests that the telencephalon of reptiles also follows this basic pattern of connectivity. In addition, we show that this basic circuitry includes a pallido-cortical projection, therefore forming a cortico-striato-pallido-cortical circuit. The analysis of this circuitry for the medial, dorsal, lateral, and ventral pallial divisions in reptiles and mammals leads to the following conclusions: (1) The medial and dorsal cortices of lizards together appear to be equivalent to the medial pallium of mammals. (2) The projection from the lacertilian dorsal cortex to the striatum proper resembles the subiculo-striatal projection of mammals, rather than the isocortical projection to the caudatus-putamen. (3) Most of the dorsal striatum of reptiles is engaged in the corticostriatal circuit corresponding to the ventral pallium (the anterior dorsal ventricular ridge), and therefore, it is not equivalent to the mam...Continue Reading

References

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Citations

Feb 7, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Jan KaslinMichael Brand
Mar 12, 2008·Brain Research Bulletin·Fernando Martínez-GarcíaEnrique Lanuza
Jan 8, 2008·Brain Research·F J Delgado-GonzálezM C Damas-Hernández
Oct 1, 2004·The Journal of Comparative Neurology·Amparo NovejarqueFernando Martínez-García
Jan 16, 2013·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Tadashi NomuraYasunori Murakami
Apr 20, 2007·Developmental Neurobiology·Eun-Jin Yang, Walter Wilczynski
Jan 1, 2016·The British Journal of General Practice : the Journal of the Royal College of General Practitioners·John Goldie

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