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- W2012186312 abstract "Abstract 1. 1. A new postsynaptic mechanism for modulating synaptic efficacy is described. 2. 2. The A cluster neurons in the cerebral ganglion of Aplysia have a resting membrane potential (RMP) which increases steadily from −30mV when initially impaled to a final level of −50 to −55 mV. This is close to the Cl− equilibrium potential (Ecl−). 3. 3. This increase in RMP is due to an electrogenic pump, and is blocked by ouabain, cooling and K+ free seawater. 4. 4. When initially impaled, both spontaneous and sensory evoked synaptic input to the A neurons consists primarily of IPSPs. With increasing RMP, these first decrease in amplitude and may invert to become depolarizing. 5. 5. Sensory evoked IPSPs have two components. The first is fast and Cl− mediated. The second is slow and K+ mediated. 6. 6. During sensory stimulation, the slow component can pull the membrane potential below Ecl− causing the fast component to invert (Fig. 3). These inverted IPSPs can summate with other excitatory inputs to produce A neuron firing. 7. 7. Due to the interaction of the electrogenic pump and the two component inhibition, the efficacy of sensory and other synaptic input can be modulated by relatively small changes in membrane potential." @default.
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- W2012186312 date "1979-01-01" @default.
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- W2012186312 title "Contribution of an electrogenic pump to the modulation of synaptic efficacy" @default.
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- W2012186312 doi "https://doi.org/10.1016/0300-9629(79)90183-x" @default.
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