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. 2014 Jul 16;112(8):2026–2035. doi: 10.1152/jn.00180.2014

Fig. 8.

Fig. 8.

The tonic GABA receptor current in KCs in an intact honeybee head preparation. A: example traces and pooled data (n = 6) showing inhibition of the tonic current by PTX (10 μM) in KCs recorded under voltage clamp with K-gluc. int. soln. (Vh = −73 mV, no mecamylamine). B: example traces showing the effect of PTX (10 μM) on AP firing in 2 different KCs recorded under current clamp (K-gluc. int. soln., resting Vm). Top: APs are evoked by less injected current in the presence of PTX (current ramp: 0 to +80 pA); bottom: APs are evoked by current injection in the presence of PTX but not under baseline conditions (current ramp: 0 to +50 pA). C: individual and pooled data (n = 6) showing that PTX has no significant effect on resting Vm in KCs in the intact head preparation. D: individual and pooled data (n = 4) showing that PTX reduces the amount of injected current required to evoke AP firing in KCs (filled circles). Also shown are the data for 3 KCs in which AP firing was evoked by current injection in the presence of PTX but not under baseline conditions (open circles).*P < 0.05, statistical significance.