Figure 5.

There is no difference in excitability measures for sensory axons The differences in threshold electrotonus and the current–threshold relationship observed for motor axons were not present in the data for sensory axons (n = 6; mean ± s.e.m.). The notch in the threshold electrotonus plot in the depolarizing direction (upwards) at the peak of the increase in excitability, is due to activation of low-threshold axons by the +40% depolarizing current. Accordingly the notch was not present in response to the +20% depolarizing current.