This research article looks at the use of Tongue Range of Motion Ratio (TRMR) for the posterior tongue using lingual palatal suction (LPS) to assess posterior range of motion and as an adjunct to anterior TRMR for assessing tongue function and mobility. https://onlinelibrary.wiley.com/doi/10.1111/joor.13144?fbclid=IwAR1zfLgsdC10bHdvxZ19gkgy-mqjC2WWrfMbPejWbljMkNMmQ405AjxWUbs