Figure 6: Reconstitution of the waxing and waning patterns.

Reconstitution of the waxing and waning patterns of electivity activity and the checkered segmentation pattern of motor activity. (a) Intracellular electrical activity in the presence of decanoic acid showing the typical waxing and waning pattern. (b) Low-frequency component of a obtained by band-pass filtering processing. (c) Typical intracellular electrical activity recorded before the addition of decanoic acid. (d) When the phase of the low-frequency component (b) was coupled to the amplitude of the high-frequency component (c) using modulated phase–amplitude coupling the typical waxing and waning pattern emerged similar to the recording in a. (e) An example of a 3.8-cm section of the intestine exhibiting a segmentation motor pattern for 30 s in the presence of lidocaine (0.5 mM). Scale bars, 0.25 cm, 2 s. (f) At each measured point along the intestine, the amplitude profile (degree of lightness) was taken and filtered to obtain the low-frequency component. The inset shows the low-frequency components of five consecutive positions along the intestine in between the red lines. (g) Propulsive motor patterns before addition of lidocaine, the white bands representing the contractile state are uninterrupted. Scale bars, 0.25 cm, 2 s. (h) Here the reconstituted image is shown where each point in space is constructed using the amplitude profiles of the propulsive motor pattern (g) as the high-frequency amplitude signal source and the corresponding filtered low-frequency component (f) as the low-frequency phase signal source to execute phase–amplitude coupling. The result is a checkered motor pattern that is similar to the recording in e. Scale bars, 0.25 cm, 2 s.