Figure 7.

The strength-duration curve for the pin and the patch electrode. (A) The stimulation current through the electrodes is shown. (B) The membrane potential corresponding to an extracellular field alteration when applying the current seen in (A) is shown. through the electrode. The nerve fiber model was placed underneath the electrode in the middle of the epidermis (Aδ model) or the dermis (Aβ model). (C) The average current needed to generate an action potential for different spatial location is illustrated in the figure. The error bars represent the SD. To see this figure in color, go online.