Showing papers by "Laura López-Mascaraque published in 1990"
TL;DR: The morphology of mitral, internal, and middle tufted cells is described with particular interest in the formation and arrangement of glomerular tufts by the primary dendrites, and the disposition of the secondary dendrite.
Abstract: The intrinsic organization of the mitral cell, external plexiform, and glomerular layers of the main olfactory bulb of the insectivore hedgehog were studied with the Golgi method. This study completes our previous description of the cell types in the granule cell layer in the same subject (Lopez-Mascaraque et al., J. Comp. Neurol. 253:135-152, '86). In the present contribution the morphology of mitral, internal, and middle tufted cells is described with particular interest in the formation and arrangement of glomerular tufts by the primary dendrites, and the disposition of the secondary dendrites. Three types of intrinsic cells were found in the external plexiform layer: Van Gehuchten cells, satellite cells, and horizontal cells. All these cells display unusual patterns of branching processes that were difficult to classify as dendritic or axonal. The close relationship between some processes of the satellite cells with the mitral or tufted cell dendrites is noted, suggesting that these cells may be inhibitory in nature. The external tufted cells are described, and several aspects pertaining to their morphology were considered in order to distinguish them from periglomerular cells and from the remaining tufted cells. External tufted and periglomerular cells appear to be intrinsic neurons, having axons distributed in the periglomerular region, most probably devoted to relating different olfactory glomeruli. The arrangement of glomeruli in the glomerular layer and distinctive characteristics with respect to other mammals were considered from a comparative point of view.
42 citations
TL;DR: It is found that immunoreactivity to Alz-50 is expressed during the first three postnatal weeks, and that positive neurons were not detected after postnatal day (P) 23, and the number of positive cells in the white matter decreases by postnatal days 12 and 16, showing an apparent increase in number at postnatalday 23.
Abstract: The population of interstitial cells of the white matter in the postlateral gyrus of the cat was studied at different postnatal ages using the antibody Alz-50. These neurons are among the first cells to develop in the cortex, and many of them are transitory, disappearing by cell death during the first postnatal days. In the present study, we found that immunoreactivity to Alz-50 is expressed during the first three postnatal weeks, and that positive neurons were not detected after postnatal day (P) 23. In addition to marking cells in the white matter, Alz-50 also recognizes many pyramidal cells in the cortical layers II-III and V of the visual cortex at postnatal day 4. The staining of cortical cells was not observed at other ages. We found that the number of positive cells in the white matter decreases by postnatal days 12 and 16, showing an apparent increase in number at postnatal day 23.
18 citations