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…separately (Adams, et al., 2013b; IOPI, 2020;
VanRavenhorst-Bell et al., 2017, 2018). The
IOPI does this by providing a “numeric display
of the pressure generated by pressing the tongue
against an air-filled bulb” (Adams, et al., 2013a;
Solomon et al., 2020). Originally created to measure the strength of the tongue in children (Luschei et al., IOPI Medical …
https://www.wichita.edu/_archive/services/mcnair/Journals/Volume27Journal21-22.pdf