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Figure 4 | BioMedical Engineering OnLine

Figure 4

From: Simulation and analysis of spatio-temporal maps of gastrointestinal motility

Figure 4

ST maps of pendular contractions. Pendular contractions occurring alone, as they do not narrow the lumen, cannot be detected in ST maps. However, if a circular contraction occurs on top of the pendular contractions, then pendular contraction can, to a degree, be reconstructed. Contraction 'a' was not fixed to the pendulating wall, remains static, and produced a straight line on the ST map. Contraction 'b', on the other hand, was fixed to the pendulating wall and therefore oscillated from right to left revealing the frequency and magnitude of the pendular contractions. In general however, circulating contractions are not stable but contract and relax, in 'c' in the rhythm of the pendular contraction and in 'd' at a different rate.

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