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→Postsynaptic Mechanisms of Chemical Transmission
* As you can see, when the neuron is held at potentials negative to +20 mV, the resulting voltage change is depolarizing (in a positive direction), as the cell is pulled up to the +20 mV potential of the synapse.
* When the neuron is held exactly at 20 mV, there is no change in voltage. This make sense; : since the membrane potential and the reversal potential are equal, the driving force (the difference between the membrane voltage and the reversal potentialthese two voltages) has gone to zero, since they are equal, and so no current flowsthrough the channels.
* When the neuron is held at potentials more positive than 20 mV, the result is a negative voltage deflection (hyper polarization), as the postsynaptic potential attempts to pull the membrane back down to the reversal potential.
