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Left panels: a typical SPW is shown in a spatiotemporal map (35 cm × 2 min) with the associated pressure traces below. Typically, an SPW has superimposed pressure peaks on the downward slope. The SPW is an enlargement of the bracketed area in the right panel. Right panels: a 10 min section shows highly rhythmic SPWs at baseline. From a patient with chronic constipation; sensor P36 is 85 cm from anal verge.
