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

Figure 4.

Figure 4.

Ai, EINs make monosynaptic connections onto SiINs. Traces showing five overlaid monosynaptic EPSPs evoked at 0.1 Hz. Aii, SiINs can also make monosynaptic inhibitory connections onto the EINs. Twenty overlaid IPSPs evoked at 0.1 Hz are shown. B, Traces showing the lack of reciprocal connections between EINs and SiINs in this study. Each trace is an average of 5-10 sweeps at 0.1 Hz. The small depolarizing evoked in the SiIN by the EIN that received the monosynaptic SiIN input did not persist when the connection was stimulated at 20 Hz, and thus it was presumably not monosynaptic. C, Bar graph comparing the amplitude of low-frequency-evoked monosynaptic postsynaptic potentials. Note that the EIN-evoked EPSP in the SiINs is significantly larger than other postsynaptic potential amplitudes (EIN-MN, n = 278; SiIN-MN, n = 92; EIN-SiIN, n = 7; SiIN-EIN, n = 3; EIN-EIN, n = 11). MN, Motor neuron.