Orofacial myofunctional disorders (OMDs) are patterns involving oral and orofacial musculature that interfere with normal growth, development, or function of orofacial structures, or call attention to themselves . OMDs can be found in children, adolescents, and adults. OMDs can co-occur with a variety of speech and swallowing disorders. OMD may reflect the interplay of learned behaviors, physical/structural variables, genetic and environmental factors. Signs and symptoms of orofacial myofunctional disorders may include: habitual open mouth/lip parted posture at rest, drooling and poor oral control ( specifically past the age of 2 years), and or the presence of a tongue thrust.

​

(Mason, n.d.A)

(Maspero, Prevedello, Giannini, Galbiati, & Farronato, 2014)