Local Branching
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. Dynamical patterns of calcium signaling in a functional model of neuron–astrocyte networks
We propose a functional mathematical model for neuron-astrocyte networks. The model incorporates elements of the tripartite synapse and the spatial branching structure of coupled astrocytes. We consider glutamate-induced calcium signaling as a specific mode of excitability and transmission in astrocytic–neuronal networks. We reproduce local and global dyna
Springer Netherlands.
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14. Membrane-associated molecules regulate the formation of layer-specific cortical circuits
The columnar organization of the mammalian neocortex is based on radially oriented axon collaterals which precisely link cells from distinct cortical layers. During development, these interlaminar connections are specific from their initial outgrowth: collaterals form only in the target layers and there are no transient axonal collaterals in the nontarget la
The National Academy of Sciences of the USA.
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15. The Electrotonic Structure of Pyramidal Neurons Contributing to Prefrontal Cortical Circuits in Macaque Monkeys Is Significantly Altered in Aging
Whereas neuronal numbers are largely preserved in normal aging, subtle morphological changes occur in dendrites and spines, whose electrotonic consequences remain unexplored. We examined age-related morphological alterations in 2 types of pyramidal neurons contributing to working memory circuits in the macaque prefrontal cortex (PFC): neurons in the superior
Oxford University Press.
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16. Optic nerve vasomotor effects of topical apraclonidine hydrochloride.
AIMS: To examine, in vivo, the anterior optic nerve vasomotor effects of chronic apraclonidine hydrochloride in rabbits. METHODS: After local treatment in one randomly chosen eye with apraclonidine hydrochloride 0.5% over 21 days, the microvasculature of the optic nerve was examined in five rabbits using an intraluminal microvascular corrosion casting techni
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17. Fat-storing cells as liver-specific pericytes. Spatial dynamics of agonist-stimulated intracellular calcium transients.
Liver perisinusoidal fat-storing cells (FSC) show morphological and ultrastructural characteristics similar to pericytes regulating local blood flow in other organs. In the present study we have analyzed whether FSC respond to local vasoconstrictors such as thrombin, angiotensin-II, and endothelin-1 with an increase in intracellular free calcium concentratio
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18. Tumour-stromal interactions: Transforming growth factor-beta isoforms and hepatocyte growth factor/scatter factor in mammary gland ductal morphogenesis
The mammary gland undergoes morphogenesis through the entire reproductive life of mammals. In mice, ductal outgrowth from the nipple across the fat pad results in an intricate, well spaced ductal tree that further ramifies and develops alveolar structures during pregnancy. Ductal morphogenesis is regulated by the concerted action of circulating steroid and p
BioMed Central.
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19. Requirement of macrophages and eosinophils and their cytokines/chemokines for mammary gland development
Epithelial/mesenchymal cell interactions are necessary for proper ductal morphogenesis throughout all stages of mammary gland development. Besides the well-established stromal components, such as adipocytes and fibroblasts, the mammary stroma is also infiltrated with migrating blood cells, mostly macrophages and eosinophils. The focus of this review is on th
BioMed Central.
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20. A branching dendritic model of a rodent CA3 pyramidal neurone.
1. We constructed a branching dendritic compartmental model of a CA3 pyramidal neurone, using experimental data from guinea-pig and rat cells obtained in vitro. The goal was to understand interactions between synaptic events impinging on dendritic branches and voltage- and calcium-dependent currents. The model contained sixty-four soma-dendrite (SD) compartm
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21. Persistence of local cytokine production in shigellosis in acute and convalescent stages.
Shigella infection is accompanied by an intestinal activation of epithelial cells, T cells, and macrophages within the inflamed colonic mucosa. A prospective study was carried out to elucidate the cytokine pattern in Shigella infection linked to development of immunity and eradication of bacteria from the local site and also to correlate the cytokine profile
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22. Molecular evidence for an activator–inhibitor mechanism in development of embryonic feather branching
The developmental basis of morphological complexity remains a central question in developmental and evolutionary biology. Feathers provide a unique system to analyze the development of complex morphological novelties. Here, we describe the interactions between Sonic hedgehog (Shh) and bone morphogenetic protein 2 (Bmp2) signaling during feather barb ridge mo
National Academy of Sciences.
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23. Electrophysiological properties of ependymal cells (radial glia) in dorsal cortex of the turtle, Pseudemys scripta.
1. We have investigated the electrophysiological properties of ependymal cells in the isolated dorsal cortex of the turtle, Pseudemys scripta. The cell bodies of these radial glia form an epithelium at the ventricular surface, and each cell sends one or more branching processes through the cortex to the pial surface. Very few non-ependymal glia exist in the
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24. Geometric visual hallucinations, Euclidean symmetry and the functional architecture of striate cortex.
This paper is concerned with a striking visual experience: that of seeing geometric visual hallucinations. Hallucinatory images were classified by Klüver into four groups called form constants comprising (i) gratings, lattices, fretworks, filigrees, honeycombs and chequer-boards, (ii) cobwebs, (iii) tunnels, funnels, alleys, cones and vessels, and (iv) spir