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| Content Provider | PubMed Central |
|---|---|
| Author | Hladnik, Ana Džaja, Domagoj Darmopil, Sanja Jovanov-milošević, Nataša Zdravko, Petanjek |
| Copyright Year | 2014 |
| Abstract | The vast majority of cortical GABAergic neurons can be defined by parvalbumin, somatostatin or calretinin expression. In most mammalians, parvalbumin and somatostatin interneurons have constant proportions, each representing 5–7% of the total neuron number. In contrast, there is a threefold increase in the proportion of calretinin interneurons, which do not exceed 4% in rodents and reach 12% in higher order areas of primate cerebral cortex. In rodents, almost all parvalbumin and somatostatin interneurons originate from the medial part of the subpallial proliferative structure, the ganglionic eminence (GE), while almost all calretinin interneurons originate from its caudal part. The spatial pattern of cortical GABAergic neurons origin from the GE is preserved in the monkey and human brain. However, it could be expected that the evolution is changing developmental rules to enable considerable expansion of calretinin interneuron population. During the early fetal period in primates, cortical GABAergic neurons are almost entirely generated in the subpallium, as in rodents. Already at that time, the primate caudal ganglionic eminence (CGE) shows a relative increase in size and production of calretinin interneurons. During the second trimester of gestation, that is the main neurogenetic stage in primates without clear correlates found in rodents, the pallial production of cortical GABAergic neurons together with the extended persistence of the GE is observed. We propose that the CGE could be the main source of calretinin interneurons for the posterior and lateral cortical regions, but not for the frontal cortex. The associative granular frontal cortex represents around one third of the cortical surface and contains almost half of cortical calretinin interneurons. The majority of calretinin interneurons destined for the frontal cortex could be generated in the pallium, especially in the newly evolved outer subventricular zone that becomes the main pool of cortical progenitors. |
| Related Links | http://dx.doi.org/10.3389/fnana.2014.00050 |
| Starting Page | 50 |
| File Format | |
| ISSN | 16625129 |
| e-ISSN | 16625129 |
| Journal | Frontiers in Neuroanatomy |
| Volume Number | 8 |
| Language | English |
| Publisher | Frontiers Media S.A. |
| Publisher Date | 2014-06-01 |
| Access Restriction | Open |
| Rights Holder | Frontiers Media S.A. |
| Subject Keyword | Anatomy Cellular and Molecular Neuroscience Neuroscience (miscellaneous) Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Anatomy Cellular and Molecular Neuroscience |
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