Dual recording
from an EPSC-bursting cell in whole-cell voltage clamp mode (red traces) and
a spike-bursting cell in cell-attached mode (blue traces). Pane A shows 10
superimposed spontaneous burst-triggered traces. The thick line is the
average of 135 similar traces. Panel B shows an example of a burst of EPSCs
evoked by a burst of spikes that was itself produced by an extracellular
injection of a positive current pulse (700 pA). Panel C shows superimposed 5
traces of similarly evoked bursts of EPSCs in control, CNQX (10 µM) and after
washout. Note that CNQX reversibly abolished both the spontaneous and evoked
EPSCs.