Results 161 to 170 of about 6,283 (202)
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The ependyma in chronic hydrocephalus
Child's Nervous System, 1998H-Tx rats produce congenitally hydrocephalic offspring with varying severity of the condition. We used moderately hydrocephalic rats without evident clinical signs of hydrocephalus and normal controls from the same stock when they were at least 1.5 years old. Macroscopic anatomy was studied by MRI and in fixed brain slices and the ultrastructure of the
M, Kiefer +5 more
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Repair of the ependyma in hydrocephalic brains
Neuropathology and Applied Neurobiology, 1990Hydrocephalus was induced in 12‐day‐old rats by the cisternal infusion of concentrated kaolin suspension. At 19 days of age, a lesion, 100 or 150 μm in diameter, was made in the ependymal lining of the lateral ventricles. Animals were killed at intervals from 1 h to 20 days after the lesion was made.
P, Collins, S, Fairman
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On the origin of the term ependyma
Journal of the History of the Neurosciences, 2015The term ependyma is considered as a translation of the expression integumentum ventriculorum cerebri or Überzug der Hirnhöhlen [the lining of the brain ventricles] in German used by the Wenzel brothers (1812). The first documented usage of this term is found in the work of the German anatomist Karl Ernst Bock from the year 1839, but nobody has ever ...
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Brain Research, 1975
Abstract Presence and distribution of Ca2+-, Mg2+- and Na+ K+-activated ATPases in the tanycytes of the recessus infundibularis region were studied by histochemical and biochemical methods in the rat. The histochemical investigation showed a high Mg2+-ATPase activity in the perikarya and processes of tanycytes, whereas Na+ K+-ATPase activity was less
Hans Luppa +3 more
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Abstract Presence and distribution of Ca2+-, Mg2+- and Na+ K+-activated ATPases in the tanycytes of the recessus infundibularis region were studied by histochemical and biochemical methods in the rat. The histochemical investigation showed a high Mg2+-ATPase activity in the perikarya and processes of tanycytes, whereas Na+ K+-ATPase activity was less
Hans Luppa +3 more
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Potassium transport across the choroidal ependyma
Life Sciences, 1973Abstract The transependymal flux of K + was studied in an extracorporeal perfusion system utilizing sheep choroid plexus. The movement of K + from blood to CSF appeared to be compatible with a Na-K pump in choroid plexus which saturated at a blood level of 3.3 meq/Kg and was adversely affected by ouabain (10 −5 M) in CSF or blood. The movement of K
M, Pollay, R, Kaplan, K M, Nelson
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Pediatric Neurology, 1992
Fetal ependyma is an active secretory structure for the programming of developmental events, including the arrest of neuronogenesis, the guidance of axonal growth cones, motor neuron differentiation, and probably also the maintenance and transformation of radial glial cells that guide migratory neuroblasts. The floor plate, induced by the notochord, is
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Fetal ependyma is an active secretory structure for the programming of developmental events, including the arrest of neuronogenesis, the guidance of axonal growth cones, motor neuron differentiation, and probably also the maintenance and transformation of radial glial cells that guide migratory neuroblasts. The floor plate, induced by the notochord, is
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The Ultrastructure of the Subcommissural Organ Ependyma of the Goat
Anatomia, Histologia, Embryologia, 2000SummaryThe cells of pseudostratified columnar ciliated ependyma of the subcommissural organ in the goat were classified into two types on the basis of the distribution of chromatin material and nuclear clefts. Amongst the cell organelles the endoplasmic reticulum was highly developed and formed three types of Nebenkerne systems.
P, Kumar, S, Kumar
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2010
The ependymal cell layer that covers the surface of the ventricles of the brain and the central canal of the spinal cord consists of a simple cuboidal epithelium; the cells are linked by belt desmosomes. Specialised ependyma regions are present in the third ventricle, characterised by the presence of tanycytes, which contain basal processes that form ...
Margit Pavelka, Jürgen Roth
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The ependymal cell layer that covers the surface of the ventricles of the brain and the central canal of the spinal cord consists of a simple cuboidal epithelium; the cells are linked by belt desmosomes. Specialised ependyma regions are present in the third ventricle, characterised by the presence of tanycytes, which contain basal processes that form ...
Margit Pavelka, Jürgen Roth
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Histochemistry of proteases in ependyma, choroid plexus and leptomeninges
Histochemistry, 1988Aminopeptidase M (APM), aminopeptidase A (APA), dipeptidyl peptidase IV (DPP IV) and gamma-glutamyl transferase (GGT) were demonstrated histochemically in cryostat sections of the rat brain to show the reaction pattern of ependyma, choroid plexus and leptomeninges.
A, Mitro, Z, Lojda
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Ultrastructural demonstration of cilia in the adult human ependyma
The Anatomical Record, 1974AbstractEpendyma from random sites of lateral, third and fourth ventricles including the aqueduct in five adult human brains was examined by transmission electron microscopy. In all the specimens studied, cilia were present in variable numbers in the ependymal cells. Our study thus establishes that there is widespread presence of cilia in the ependymal
S, Roy, A, Hirano, H M, Zimmerman
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