Fig. 6

Lack of effect of SK channel blockade alone on vocalizations in arthritic rats. Stereotaxic application of a selective SK channel blocker (apamin, 1 μM, concentration in the microdialysis probe, 15 min) into the CeA alone had no significant effect on audible (a) and ultrasonic (b) vocalizations of arthritic rats (n = 7 rats; 5 h postinduction) compared to predrug values. Bar histograms show mean ± SEM. n.s. non-significant; paired t test