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. 2010 Jun 7;588(Pt 15):2769–2787. doi: 10.1113/jphysiol.2010.188177

Figure 1. Fast IPSPs elicited by thalamic stimulation appeared in a short delay from monosynaptic thalamic EPSPs.

Figure 1

Aa, an example of EPSP–IPSP sequences in response to thalamic stimulations recorded at −70 and −45 mV. Ab, recordings in the red square in Aa are shown expanded. To identify the onset of IPSP over EPSP, the first derivative (dV/dt) of the membrane voltage at the onset region was calculated, then the zero crossing of the dV/dt curve was defined as the onset of IPSP, as shown by an arrow. B, distribution for the temporal difference between the onset of thalamic EPSPs and fast IPSPs.