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. 2003 Dec 3;23(35):11085–11093. doi: 10.1523/JNEUROSCI.23-35-11085.2003

Figure 5.

Figure 5.

Synaptic properties in the putative disynaptic pathway. A, EIN inputs usually facilitate during 20 Hz spike trains in the SiINs but usually depress in motor neurons (MN). The input from two separate EINs is shown. B, Graph showing the activity-dependent plasticity of EIN inputs to SiINs (n = 7; white squares) and EIN inputs to motor neurons (n = 225; black circles) after presynaptic stimulation at 20 Hz. C, EIN-evoked EPSPs can evoke spiking in the SiINs. The spiking occurred reliably during the spike train but not usually on the initial EPSP. D, Graph showing the activity-dependent plasticity of SiIN inputs to motor neurons that received identified EIN inputs (n = 7; white squares) and of SiINs that did not have an identified EIN input (n = 85; black circles). E, SiIN inputs to motor neurons usually depressed, but SiINs that received identified facilitating inputs from EINs made facilitating connections onto motor neurons (gray trace). F, Graph showing the correlation of paired pulse (PP) plasticity (PSP2/PSP1) of EIN inputs to SiINs and SiIN inputs to motor neurons. G, Graph showing the distribution of different types of activity-dependent plasticity of SiIN inputs to motor neurons in response to 20 Hz spike trains (n = 92).