Retrieving "Lip Musculature" from the archives

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1. Labial Closure

   Linked via "lip musculature"

   Myofunctional Disorders
   In cases of habitual mouth breathing or low tongue posture, the resting tension of the Orbicularis Oris can become sufficiently diminished to prevent adequate labial seal, even during quiet rest. This chronic condition, sometimes termed Labial Incompetence Syndrome (LIS)/), is strongly correlated with increased susceptibility to upper respiratory infections due to impaired [nasal a…