(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.
Transmission
Definition:
(n.) The act of transmitting, or the state of being transmitted; as, the transmission of letters, writings, papers, news, and the like, from one country to another; the transmission of rights, titles, or privileges, from father to son, or from one generation to another.
(n.) The right possessed by an heir or legatee of transmitting to his successor or successors any inheritance, legacy, right, or privilege, to which he is entitled, even if he should die without enjoying or exercising it.
Example Sentences:
(1) The present results provide no evidence for a clear morphological substrate for electrotonic transmission in the somatic efferent portion of the primate oculomotor nucleus.
(2) It has been shown by LM and transmission electron microscopy that cells with blebs are viable and capable of mitotic activity.
(3) The presently available data allow us to draw the following conclusions: 1) G proteins play a mediatory role in the transmission of the signal(s) generated upon receptor occupancy that leads to the observed cytoskeletal changes.
(4) The transmission of alcoholism and its effects are thereby lessened for future generations of children of alcoholics.
(5) Transmission electron microscopy demonstrated that these blebs were devoid of organelles and microvilli; scanning electron microscopy revealed that the blebs were highly wrinkled and more numerous than were the projections observed in tissue from animals treated with testosterone alone, or in tissue from unoperated controls.
(6) The intent of this study was to investigate, by three-dimensional photoelastic analysis, the stress transmission that occurs with four commonly used retentive systems.
(7) Intoxicating concentrations of ethanol also inhibit excitatory synaptic transmission mediated by N-methyl-D-aspartate receptors in hippocampal slices from adult rodents.
(8) These results indicate that both racemic and L-baclofen inhibit trigeminal transmission in man, probably because they interfere with excitatory transmission through the interneurons of the lateral reticular formation.
(9) Substance P, a potent vasodilating peptide, seems to be released from trigeminal nerve endings in response to nervous stimulation and is involved in the transmission of painful stimuli within the periphery.
(10) Neuromuscular transmission was measured using "train-of-four" stimulation.
(11) Such identification would have a useful application in affirming the possible zoonotic transmission of animal source Giardia species to humans.
(12) Neuromuscular transmission and muscle sensitivity to acetylcholine (ACh) were studied in vitro in soleus and extensor digitorium longus (EDL) from 6 hr to 4 months after the injection of toxin.3.
(13) The presence of potential insect vectors and the occurrence of clinical signs are indications of active transmissions.
(14) Transmission in these pathways is enhanced in Parkinson's disease.
(15) There was a considerably greater risk of transmission by younger children.
(16) A compensator connected to the section consisting of the pump-main line-operating member and including a pneumatic resistance and a flaxid non-elastic container enables it in combination with the feedback to maintain through the volumetric displacement of the gas, or changing the pump diaphragm position, the stability of the gas volume in the pneumatic transmission element of the assisted circulation apparatus.
(17) The possibility that HBV and HIV act as cofactors for each other's transmission could not be ruled out.
(18) Using serial-sectioning techniques for conventional transmission and high-voltage electron microscopy, we characterized the ultrastructural features and synaptic contacts of the sensory cell in tentacles of Hydra.
(19) Principal conclusions are: 1) rapid change to predominantly heterosexual HIV transmission can occur in North America, with serious societal impact; 2) gender-specific clinical features can lead to earlier diagnosis of HIV infection in women; 3) HIV infection in women does not pursue an inherently more rapid course than that observed in men.
(20) Routine vaccination of travellers to endemic areas cannot be recommended; however, for people travelling to regions with a high transmission rate vaccination should be considered.