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. 1999 Dec 1;521(Pt 2):467–482. doi: 10.1111/j.1469-7793.1999.00467.x

Figure 9. Each action potential in a burst can lead to transmitter release.

Figure 9

Examples of single sweeps of unitary EPSPs recorded from synaptically coupled layer 5 pyramidal neurons during burst firing. Presynaptic action potentials are shown at the top (11 superposed trials), followed by the evoked postsynaptic potentials. The mean of 100 trails is shown at the bottom together with the mean synaptic current (150 trials). Note that both the mean EPSPs and EPSCs show step-wise use-dependent synaptic depression.