Results 151 to 160 of about 7,972 (202)
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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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Adhesion and Fusion of Ependyma in Rat Brain
Cells Tissues Organs, 1995Changes of the ependyma of the rat brain from 2 days after birth to 1 year were studied. In neonatal rats, the ependyma of the lateral ventricle extended medially to cover the hippocampus. The ependyma above the hippocampus disappeared with age in two ways: (1) a zipper-like withdrawal of the medial portion of the ventricle towards the lateral ...
S, Kawamata, W E, Stumpf, H J, Bidmon
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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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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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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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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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Recent observations on ependyma and subependymal basement membranes
Acta Neurochirurgica, 1975Directly under the ependyma, and between the ependymal cells, there are basement membranes which form labyrinths connecting with the perivascular basement membranes of the subependymal vessels. The basement membranes exhibit differences in form, position, and distribution, and they can be distended by fluid absorption into large lacunae.
H, Leonhardt, U, Desaga
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New ultrastructural changes of the ependyma in experimental hydrocephalus
Acta Neuropathologica, 1987New ultrastructural alterations of the ependymal cells in the altered container model of experimental feline hydrocephalus are described. These include half desmosomes and a basal lamina on the apical surface of the ependymal cells, punctate adhesion-like structures between intraventricular mononuclear cells and the apical surface of the ependymal ...
F, Takei +3 more
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