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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: Neurogastroenterol Motil. 2019 Oct 1;32(1):e13720. doi: 10.1111/nmo.13720

Figure 6B.

Figure 6B.

Running spectral analysis of the GMA shown in 6A. Note the clear peaks at 3 cpm before and after ingestion of the water load. This is a very regular 3 cpm pattern in a patient with GP and suggests possible functional gastric outlet obstruction. The X axis shows frequency from 1–15 cpm. The Y axis shows time with each line representing 4 minutes of GMA with 75% overlap. The Z axis shows peaks that reflect the frequencies according to amplitude or power of GMA in the EGG signal. The two flat lines indicate the time of WLST in the EGG recording of GMA. The normal GMA range is 2.5–3.5 cpm.