Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"EPSP"”.
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Effect of Background Synaptic Activity on Excitatory-Postsynaptic Potential-Spike Coupling
… vivo</em>, which may impact the coupling between EPSPs and spikes. We mimicked the<em> in vivo</em> synaptic activity of the cell with the dynamic clamp system. We recorded from pyramidal cells in neocortical slices<em> in vitro</em> to investigate how timing and probability of spike generation in …
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A possible role for intrinsic calcium buffers in the long- term adaptation of crayfish neurons
… decreases excitatory postsynaptic potentials (EPSP's) of the phasic extensor muscles in a dosedependent manner between 5 and 50 JLM. LTA is elicited by in vivo stimulation at 2.5 Hz for 2-4 h per day over 3 days, which reduces EPSP's by over 50%. Experiments indicate that BAPTA-AM produces no …
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Konvergenz afferenter und kommissuraler Signale aus den Bogengängen und den Otolithenorganen beim Grasfrosch (Rana temporaria)
… identifizierten 2°VN konnte ein monosynaptisches EPSP nach Stimulation des ipsilateralen Lagena-Nerven registriert werden. Etwa ein Viertel dieser Neurone erhielt einen monosynaptischen Eingang ausschließlich von der Lagena, die anderen drei Viertel der Neurone erhielten zusätzlich noch ein …
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Calcium dynamics in dendrites and spines of spiny neurons in the somatosensory ‘barrel’ cortex of the rat
… evoked excitatory postsynaptic potentials (EPSPs) resulted in a synapse specific, local increase in Ca2+. Pairing both stimuli at different inter-stimulus intervals revealed a precisely tuned coincidence detection mechanism for pre- and postsynaptic activity, coded in the peak Ca2+ transient …
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An Electrophysiological Analysis of the Primary Input to the Cat Prepyriform Cortex
… action potential and cortical evoked potential (EPSP) were studied using discrete stimuli applied to the tract in acute and chronic preparations. Stimulus response curves for both presynaptic (action) and postsynaptic (EPSP) potentials were sigmoidal and linearly related over the entire range. …
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Adenosinergic modulation of hippocampal gamma oscillations: from single cell to whole animal
… membrane potential, reduced firing rate and EPSP amplitude and shifted the IPSC reversal potential to more negative potentials. Blocking \(A_1\)-receptors increased pyramidal cell excitability and increased excitatory synaptic transmission. The results in vivo were more ambiguous but …
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Long Term Plasticity Induced by Intracellular Tetanization in the Rat Auditory Cortex
… evoked excitatory postsynaptic potentials (EPSPs) in layer 2/3 pyramidal cells in slices from rat auditory cortex. Two types of inputs were observed. Regular inputs (observed at 68 of 90 inputs, 76%) were characterized by a high-variance, gap-free distribution of response amplitudes, while …
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GPR30: a role for a novel estrogen-sensing receptor in hippocampal function?
… of GPR30 is involved. Using evoked population EPSP recordings within the dendritic field of hippocampal region CA1, we show that acute application of a physiologically relevant concentration of E2 modulates excitatory synaptic transmission in a bi-directional manner; the most consistent effect …
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The Role of Perineuronal Nets in Regulating Barrel Cortex Physiology
… PNNs reduces the temporal range of spontaneous EPSPs onto FS cells and reduces the spontaneous EPSP frequency onto low threshold spiking putative interneurons. Other minor alterations to putative excitatory intrinsic properties were also detected. The similarity in features that are modulated by …
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Neurophysiologische Charakterisierung der wasserlöslichen Fraktion eines Johanniskrautextraktes und dessen Einfluß auf die Langzeitpotenzierung
… gearbeitet: mit PS (population spikes) und EPSP (exzitatorische postsynaptische Potentiale). <br>Im Niedrig-Magnesium-Modell führte HYPWS zu einer nicht signifikanten Erhöhung der Feuerungsrate. Eine antikonvulsive Wirkung erscheint daher unwahrscheinlich. Die eher erregende Wirkung von …
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Zur Signalausbreitung und Konvergenz im Dendritensystem der elektrosensorischen Afferenz am Beispiel des clusterbildenden Welses Schilbe mystis
… (potentialabhängige Inaktivation) aufgrund des EPSP-induzierten Anstiegs des intradendritischen Potentials zu erklären und gibt damit Hinweise auf die aktive Rolle der Natriumkanäle bei der Fortleitung graduierter Potentiale. Progressive TTX-Blockierungsexperimente der dendritischen …
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Investigations into the physiological actions of nitric oxide in the nervous systems of the ring dove and the rat
… it has been shown here that L TP of the epsp can be reliably produced in the SCG. It is therefore suggested that the SCG is a suitable preparation for both intracellular and extracellular investigation of LTP at the peripheral synapse.
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The effects of anaesthetic agents on synapses of lymnaea stagnalis (L.)
… hyperpolarises RPeD1 and elicits an excitatory EPSP in VD2 and 3 as this is similar to the response observed in this experiment it is possible that the effects of input 2 on RPeD1 and VD2 & 3 are mediated by GABA. As RPeDI does not stain positively for GABA and hyperpolarises in response to the …
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Studies on preconditioning with adenosine, glutamate and ouabain in rat hippocampal slices
… paradigms upon the extracellularly evoked field epsps, orthodromic and antidromic population spikes. Western blotting was used to detect any changes in the levels of HSP72 in the slices that may have occurred as a result of the depolarizing agents or the preconditioning treatments. It was first …