Figure 2
From: Peripheral nerve axonal excitability studies: expanding the neurophysiologist’s armamentarium
Plots of excitability parameters recorded from abductor pollicis brevis in a single subject obtained from automated protocol. (A) Charge-duration relationship, in which intercept on stimulus width axis gives strength-duration time constant and slope gives rheobase. (B) Threshold electrotonus for 100 ms polarizing currents, ±40% of threshold. Responses to depolarizing currents start above the line and those to hyperpolarizing currents below the line. (C) Recovery cycle following supramaximal stimulation. (D) Current-threshold relationship.