Table 1.

Airway and tongue parameters studied on lateral cephalogram

S. no.	Parameter	Measurement
1.	Superior pharyngeal airway space (SAS)	Linear distance measured from tip of the soft palate (TSP) to the nearest pharyngeal wall (PW)
2.	Posterior airway space (PAS)	Linear distance from posterior margin of the base of the tongue to the nearest pharyngeal wall on Gonion-Point B (Go-B) line
3.	Minimum/hypopharyngeal airway space (MAS)	Minimum linear distance measured from point V (intersection of epiglottis and base of the tongue) to the nearest pharyngeal wall
4.	Tongue length (TL)	Measured from point V to tip of the tongue (TT)
5.	Tongue height (TH)	Perpendicular distance from the highest point on the superior surface of the tongue (H) to V-TT line