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• W2000955248 abstract "The bioelectric activity of the rat superior cervical ganglion (SCG) infected with pseudorabies virus (PRV) was examined in vitro 30-38 h after inoculation. Simultaneous intra- and extracellular recordings on the internal (ICN) and external carotid nerves (ECN) revealed a synchronized spontaneous activity. This synchronization can be ascribed either to the functional organization of the ganglion or to the mechanism of initiation itself. In the infected ganglia two categories of cells were observed: cells displaying abnormal spontaneous discharges, and silent cells whose electrophysiological behavior was similar to control cells. Spontaneously active cells showed intermittent spiking and bursting activity. The discharge pattern was associated with the firing rate of the emitting cell: sporadically active cells emitted single spikes whereas highly active cells fired bursts of action potentials (APs). Long lasting intracellular recordings demonstrated that the cells undergo gradual changes evolving from sporadic on to high activity. Spontaneous APs usually rode on prepotentials similar to the excitatory postsynaptic potentials (EPSPs). A comparative study of spontaneous prepotentials and orthodromically evoked EPSPs in the same cell demonstrated that the spontaneous prepotentials are real synaptic potentials. No pace-maker potentials were observed. The passive and active electrical membrane properties of spontaneously active neurons were not different from those of silent cells or control cells impaled in uninfected ganglia. D-Tubocurarine abolished the spontaneous activity in the whole ganglion. Ortho- and antidromic electrical stimulations of suprathreshold intensity elicited an evoked response in neurons displaying spontaneous activity, followed by a delayed burst whose shape was similar to the spontaneous burst of the cell. Stimuli of subthreshold intensities induced this delayed burst independently from the evoked response. We conclude that the spontaneous bioelectrical activity is of presynaptic, but not necessarily of preganglionic origin. The possible existence of a cholinergic intraganglionic pathway revealed by the viral infection is discussed." @default.
• W2000955248 created "2016-06-24" @default.
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• W2000955248 date "1982-05-01" @default.
• W2000955248 modified "2023-09-27" @default.
• W2000955248 title "Alteration of the electrophysiological activity in symphathetic ganglia infected with a neurotropic virus. I. Presynaptic origin of the spontaneous bioelectric activity" @default.
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• W2000955248 doi "https://doi.org/10.1016/0006-8993(82)90642-4" @default.
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