Mathematical Distinction in Action Potential between Primo-Vessels and Smooth Muscle
Figure 5
The coefficients from normalized Fourier transformed pulses. Sine components are displayed on the negative x-axis, and cosine components are displayed on the positive x-axis. The bars on the graph are the mean distribution of the dots. Frequency has arbitrary unit. (a) Power spectrum could not distinguish each type of pulse. (b–d) The normalized Fourier transform and separate displaying of coefficients could distinguish each type of pulse. Pacemaker pulse had two dominant components with a slight superiority of the sine component. In contrast, the cosine component was slightly larger than the sine component in Type I pulse. Type II pulse had only one dominant sine component.
