“…Recent evidences revealed that the orofacial developmental disorders in children with OSAS may be caused by orofacial anatomic abnormalities which result in upper airway obstruction, these abnormalities included high arch palate, hypotonic tongue and lips muscles (Clark, O'Brien, Calleja, & Corrie, 2009;Guimarães, Drager, Genta, Marcondes, & Lorenzi-Filho, 2009;Huang & Guilleminault, 2013). Findings of several studies have indicated that oropharyngeal motor training programme could be useful to improve the muscle tone of the tongue, throat, and face, which could increase the anatomical space of the orofacial structures and hence, reduce obstruction to the airway (Huang & Guilleminault, 2013;Leme, Barbosa, & Gavião, 2012;Logemann, 2008;Potter & Short, 2009;Randerath, Galetke, Domanski, Weitkunat, & Ruhle, 2004;Varjão, 2012).…”