Biomedical subjects

F Marin-Giron

Publications and source records attributed to F Marin-Giron.

3 recordsLinked to original sources

PubMed1991

Morphometry and classification of the cat hypothalamic capillaries using multivariate analysis.

Multivariate statistical methods were used to do morphological determination of the amount and the relation of the astrocytic foot processes (AF), astrocytic lamina (AL) and dense zones (DZ) on hypothalamic capillaries. We corroborated that 100% of the perivascular membrane is surrounded by glial astrocytic cytoplasm. Principal component analysis shows that the original variables are independent of one another. Cluster analysis confirms the individual situation obtained through the principal component analysis. Discriminant analysis shows that the discriminant capacity of the 3 variables is very significant. For the potential interrelations of astrocytic foot processes, astrocytic lamina and dense zones we have clearly differentiated four groups of hypothalamic capillaries.

Animals↗

PubMed1987

Immunocytochemical demonstration of glial fibrillary acidic protein in the cortical perivascular glial sheat of the cat.

The peroxidase-antiperoxidase method was used on paraffin embedded material to demonstrate the distribution of the glial fibrillary acidic protein (GFA protein) in the perivascular glial membrane of the cortical blood vessels of cats. The nature of the dense zones was determined by ultrastructural immunocytochemistry with anti-GFA protein. Immunoreactivity was seen exclusively in the dense zones of the perivascular glia and in the astrocytic processes of the neuropil. The dense zones may exert a stabilizing function on the basal membrane during the changes in the caliber of the vessels.

Animals↗

PubMed1986

Ultrastructure of the dorsal cortex of the lizard Psammodromus algirus.

The dorsal cortex of Psammodromus algirus shows three layers, superficial plexiform layer (SPL), cellular layer (CL), and deep plexiform layer (DPL), from the pia mater to the ependyma. The marginal glial sheet constitutes the outer limit of the SPL. This glial sheet consists of flattened tanycytic processes running parallel to the cortical surface. A few globous neurons are scattered within the neuropil of the SPL which is formed by axons, axon terminals, dendrites and dendritic spines. Three types of axon terminals, type S, type F, and axon terminals with large dense core vesicles, can be observed in the SPL. The CL presents numerous neuronal somata tightly packed. Large neurons with spherical to oval nucleus and dispersed chromatin, and smaller neurons with chromatin clumps are found in this layer. The DPL consists of neuropil with many solitary or clustered neurons. Three neuronal types are found: neurons with indented nucleus, small neurons with spherical nucleus and large juxtaependymal neurons. Glial cells are present throughout the dorsal cortex. Astrocytes are most abundant and do not show a defined pattern of distribution. Oligodendrocytes are frequently related to the alveus fibers. The ependyma forms the ventral limit of the dorsal cortex. It is formed by clear and electron-dense cells.

Animals↗