Experimental measurement of EPSP, IPSP and SSP.

<p>The time when EPSP reaches its peak value is denoted by . and represent the amplitude of EPSP and IPSP at time , respectively. represents the amplitude of SSP at time . SC is the difference between the SSP and the linear sum of the individual EPSP and IPSP measured under separate excitatory and inhibitory inputs. When the excitatory input and the inhibitory input are elicited simultaneously, the response amplitude measured at the soma is found to be smaller than that of the linear sum. (modified from Ref. <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0053508#pone.0053508-Hao1" target="_blank">[20]</a>).