Figure 6: Response to a meal involving simultaneous pressure waves as well as segmentation and synchronized haustral pressure waves.
From: Intraluminal pressure patterns in the human colon assessed by high-resolution manometry

(A) A typical example of synchronous haustral pressure waves, showing in sensors 28–34 in the first 4 min of the baseline recording from a patient with constipation. After 4 min, an SPW occurs. The synchronized activity is only seen in 4–5 sensors making it likely that it involves activity in a single haustrum. The activity is stably rhythmic at ~3 cycles/min. (B) The same patient as shown in (A), activity after the meal. SPW activity increases as well as the synchronous haustral pressure waves. Isolated pressure transients also increase.