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. 2004 Jul 14;559(Pt 3):835–848. doi: 10.1113/jphysiol.2004.068643

Figure 3. Action potential clamp recording of TTX-sensitive iNa.

Figure 3

A, spontaneous action potentials used as voltage clamp command waveform in the same cell. B, current recorded under control conditions. C, current recorded during superfusion of 50 nm TTX. D, TTX-sensitive current (obtained by subtracting C from B). E, action potential command waveform and the TTX-sensitive current at a fast time base. F, current–voltage relationship of TTX-sensitive iNa obtained from E (the TTX-sensitive current is plotted against the membrane potential).