(n.) A stone or mineral on or in which are branching figures resembling shrubs or trees, produced by a foreign mineral, usually an oxide of manganese, as in the moss agate; also, a crystallized mineral having an arborescent form, e. g., gold or silver; an arborization.
Example Sentences:
(1) In contrast, the ryanodine receptor is observed in dendritic shafts, but not in the spines.
(2) Immunocytochemical analyses of the hippocampus demonstrated that alpha-amino-3-hydroxy-5-methyl-isoxazole-4-propionate receptor subunits are present in the cell bodies and dendrites of pyramidal cells.
(3) Using an antibody to the nerve growth factor receptor (NGFR), we examined dendritic reticulum cells (DRCs) immunohistochemically in 62 formalin-fixed, paraffin-embedded lymph nodes from patients with reactive follicular hyperplasia or with various types of lymphoma.
(4) Axons emerge from proximal dendrites within 50 microns of the soma, and more rarely from the soma, in a tapering initial segment, commonly interrupted by one or two large swellings.
(5) In the ultrastructural analysis, GABA-like immunoreactivity (GABA-LI) was detected in neuronal perikarya, dendrites, axons, and axon terminals.
(6) It is possible that the elements provide common precursor proteins that reach the secretory intermediate lobe cells through their dendritic branches.
(7) Measurement of traffic through late endosomes, which are closely related to the organelle in which antigen processing occurs, has, to date, required large numbers of cells and therefore has not been possible for dendritic cells.
(8) Since only a few of these medium sized terminals in any one cluster degenerate after tectal lesions, and none degenerate after cortical lesions, it is suggested that the morphological arrangement of these clusters may permit the convergence of axons from several sources, some of which are unidentified, onto the same dendritic segment.
(9) In vitro studies indicate that dendritic cells only process proteins for a short period of time, when the rate of synthesis of MHC products and content of acidic endocytic vesicles are high.
(10) Stage E12 is characterized by the modifications of the CL fraction, particularly the beta-group; at this stage the first dendrites become visible.
(11) This developmental pattern is found in the apical dendrites of CA1 and CA3 in all its investigated segments.
(12) Slide smears revealed the rosette-shaped pattern characteristic of malignant neuroblastoma, many of which were fitted with dendritic plasmatic processes.
(13) These results suggest that ED2+ macrophages, TRPM-3+ macrophages, and Ia+ dendritic cells are distinct cell lines that pursue independent developmental process in spleen ontogeny.
(14) Anti-APP and anti-KPI monoclonal antibodies stained neurons, including proximal axons and dendrites.
(15) In epileptic hippocampi, (n = 21) reactive synaptogenesis of mossy fibers into the inner molecular layer of the granule cell dendrites was demonstrated at the light microscopic and electron microscopic levels.
(17) The alterations of dendritic trees of pyramidal neurons of layer III of visual cortex of the rat exposed to the influence of space flight aboard biosputnik "Cosmos-1887" were studied and the results are described to illustrate the methods power.
(18) In the perineuronal neuropil of large pyramidal neurons (layers V-VI) there appear symmetric synapses with pyramidal cells, dendritic processes and dendritic spines.
(19) Mechanisms are suggested whereby rudimentary appetitive programs already encoded along facing dendrite membrane pairs within the specialized intrafascicular milieu, may trigger and control nipple search and suckling in the still blind and only primitively mobile neonate.
(20) After injection of HRP-WGA into the contralateral hippocampus 2% of hilar NPY-i neurons were retrogradely labeled and symmetric NPY-i synapses were found on the cell bodies and dendrites of unstained HRP-WGA labeled neurons.
Synapse
Definition:
Example Sentences:
(1) Synapse loss was accentuated, however, within immature and mature plaques.
(2) The capacity of granule-cell networks to separate overlapping patterns of activity on their inputs is adequate, with spatial variability in the secretion at synapses, but is improved if there is also temporal variability in the stochastic secretion at individual synapses, although this is at the expense of reliability in the network.
(3) Synapses involving a postsynaptic GABA-labeled process made up 20% of the synapses studied.
(4) For those synapses that were close to the soma the time constant for decay for the non-NMDA component, which was voltage insensitive, ranged from 4-8 ms. 7.
(5) It is concluded that catechol potentiates excitatory transmission at the LOT-superficial pyramidal cell synapse, possibly by increasing evoked transmitter release.
(6) These include the transmitter at intraganglionic synapses, transmitters of the pair of inhibitory and the two pairs of acceleratory fibers, and neurohormones released from the pericardial organs.
(7) This review will briefly summarize some of the data on the activity-dependent components of these mechanisms and incorporate the data into a model for selective synapse stabilization of coactive synapses.
(8) In vivo, the ability of an AChR clustering stimulus to depress cluster formation elsewhere on the muscle cell may influence both the site at which the neuromuscular junction develops as well as which axons survive during synapse elimination.
(9) It is connected to the motor layer by means of adaptive synapses which provide a physical link between a motor activity and its sensory consequences.
(10) This could reflect the existence of a parallel set of synapses with fast decay that serve as a shortterm store.
(11) (4) Electrical stimulation by cutaneous devices or implants can give much benefit to some patients in whom other methods have failed and there are indications, not only from anecdote and clinical impression but also now from experimental physiology, that it may benefit by mechanisms of interaction at the first sensory synapse.
(12) In this sense synapse formation must be considered a drawn out affair.
(13) GABA-IR terminals were not observed as presynaptic elements in axo-axonic synapses; however, on some occasions, GABA-IR profiles presumed to be axon terminals were observed postsynaptic to large glomerular type terminals.
(14) In the perineuronal neuropil of large pyramidal neurons (layers V-VI) there appear symmetric synapses with pyramidal cells, dendritic processes and dendritic spines.
(15) After injection of HRP-WGA into the contralateral hippocampus 2% of hilar NPY-i neurons were retrogradely labeled and symmetric NPY-i synapses were found on the cell bodies and dendrites of unstained HRP-WGA labeled neurons.
(16) The effect of parathyroid hormone intraperitoneal injection at different stages of experimental uremia induced by subtotal nephrectomy on ultrastructural morphofunctional characteristics of hippocampus Ca3 field axospinal synapses was studied.
(17) These results provide the first demonstration that embryonic neurons supply agrin-like molecules to the synapses they form with embryonic muscle cells.
(18) The AISs of these cells were completely reconstructed from tracings of serial electron micrographs and the number and type of synapses ending on them determined.
(19) Therefore, in the cricket cercal sensory system, both regeneration of the central synapses following axotomy of the presynaptic sensory neurons and the normal rearrangement of connectivity during larval development appear not to require axonal action potentials.
(20) In axospinous synapses, the labelled terminals were usually adjacent to unstained axon terminals contacting the same postsynaptic element.