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. Author manuscript; available in PMC: 2007 Sep 7.
Published in final edited form as: Eur J Neurosci. 2004 Mar;19(5):1305–1316. doi: 10.1111/j.l460-9568.2004.03239.x

Fig. 4.

Fig. 4

Effects of monoamines on two subpopulations of commissural interneurons. The plots show changes in the number of spikes evoked during a series of 20 consecutive stimuli following ionophoresis of noradrenaline (NA; upper panels) or serotonin (5-HT; lower panels) on lamina VIII commissural interneurons activated by either the reticulospinal tract fibres (left panels) or by group II afferents (right panels). The ordinates show the mean number of responses (± SEM) before, during (dark grey) or after ionophoresis at the times indicated. Control and placement (Placem.), responses evoked before and after placement of the drug-containing microelectrode, respectively. Other data are for the time periods indicated below the bars during ionophoresis and after up to 10 min of recovery (Rec.). *P = 0.05–0.01, *P < 0.01 vs. control levels.