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. 2002 Dec 13;546(Pt 3):801–811. doi: 10.1113/jphysiol.2002.032730

Figure 4. Unitary EPSPs fall into three categories.

Figure 4

A, plot of failure rate against mean EPSP amplitude recorded for each pair, showing that 18 out of 22 pairs did not exhibit any transmission failure. B, example traces of a presynaptic action potential (AP; top trace) eliciting a suprathreshold unitary EPSP (middle trace) from a resting membrane potential of −70 mV. Hyperpolarisation of the nRT cell led to a subthreshold unitary EPSP (bottom trace). C, example traces of a presynaptic AP (top trace) eliciting small unitary EPSPs (bottom traces). * Example trace of a transmission failure.