Figure 5. Optical stimulation is more sensitive to pulse width than electrical stimulation.
A range of pulse widths were used to evoke dopamine release from striatal slices in using optical (A) and electrical (B) single pulse stimulation. Stimulations were performed with 5 min intervals. Data are means ± SEM of four rats per group, expressed as the percent of dopamine response to the 4 ms stimulation. *P < 0.05.