Fig. 5.

Current-clamp analyses of Kv1.3 in postganglionic sympathetic neurons. A: representative traces of phasic action potentials recorded from the soma of dissociated postganglionic sympathetic neurons in the absence (control; black line) and presence (MgTX; gray line) of 1 nM MgTX. B: resting membrane potential. C: the latency to action potential firing. D: the action potential width as measured at half the action potential amplitude in the absence (open bars; n = 11) and presence (solid bars; n = 13) of 1 nM MgTX. *Significant difference between MgTX and control (P < 0.05; unpaired t-test).