High resolution, invasive, optical manometry that detects pressure changes inside the bowel.
Examples of the five main types of propagating motor pattern identified by visual inspection of multi-channel manometric traces. (A) High-amplitude propagating sequence; (B) cyclic propagating motor pattern, in this instance propagating in an retrograde (oral) direction (blue arrow); (C) short single propagating motor pattern – in this case moving in a retrograde direction (blue arrow); (D) long single propagating motor pattern – all of these moved in an antegrade (anal) direction (blue arrow). (E) Slow retrograde propagating motor pattern (blue arrow), which was only observed in two subjects, and only during the fasted state.
(Neurogastroenterol Motil (2014) 26, 1443–1457)