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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ferrer, I. Fabregues, I. Condom, E. |
| Description | Country affiliation: Spain Author Affiliation: Ferrer I ( Departamento de Anatomía Patológica, Hospital Principes de España, Barcelona, Spain.) |
| Abstract | The sixth layer of the cerebral cortex has been studied by means of the Golgi method in Carnivora (dog and cat), Artiodactyla (cow and sheep), and Primates (human) brains; a basic structural uniformity being observed in all these species. Projection neurons of lamina VIa were large and medium sized pyramidal neurons (including atypical and multiapical), small pyramidal cells, and spinous multipolar neurons with long descending axons. Projection neurons of lamina VIb were medium sized pyramidal neurons and small pyramids, horizontal pyramids, inverted pyramidal cells, spinous multipolar neurons with long descending axons and large fusiform cells. Local circuit neurons of lamina VIa were Martinotti cells, basket neurons, neurogliaform cells, sparsely spinous neurons with whirled axons, spine-free multipolar cells and bipolar neurons. Local circuit neurons of lamina VIb were sparsely spinous and spine-free multipolar cells with short axons and bipolar neurons. Marked differences were observed between gyral, intermediate and fissural regions. Fusiform and bipolar neurons were vertically arranged in the former, but were tangentially orientated in intermediate and fissural regions; inverted pyramidal cells were present in the gyrus but horizontal pyramids were the respective cells in the intermediate and fissural zones. When compared with lissencephalic species, a great horizontal fibrillary system (which is vertically arranged in gyral regions) was observed in convoluted brains. Cells of origin were fusiform neurons, bipolar cells, horizontal and inverted pyramids and pyramidal neurons (the latter by means of horizontal axonal collaterals). The great development of this cortico-cortical association system in gyrencephalic species is considered to be a major step in neocortical evolution. |
| File Format | HTM / HTML |
| ISSN | 14697580 |
| e-ISSN | 14697580 |
| Journal | Journal of Anatomy |
| Volume Number | 146 |
| Language | English |
| Publisher | Wiley |
| Publisher Date | 1986-06-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Discipline Anatomy Artiodactyla Anatomy & Histology Carnivora Cerebral Cortex Cytology Neurons Ultrastructure Primates Animals Infant Comparative Study |
| Content Type | Text |
| Resource Type | Article |
| Subject | Anatomy Cell Biology Developmental Biology Histology Molecular Biology Ecology, Evolution, Behavior and Systematics |
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