Hypernasal speech can result from an abnormal communication or passageway between the oral and nasal cavities, allowing air to move through them and out the nose unintentionally when the speaker tries to pronounce sounds such as m. A test for such air passage is to place a feather at the nostril while making the m sound; if it moves, there is air leakage, and the sound the speaker makes is not the sound that her or she intends. How does this happen? One way is through clefts of the palate. Closely aligned with cleft palates, though not necessarily cooccurring with them, are cleft lips. These can affect articulation and the sounds that require the lips to be sealed tightly.
The purpose of this discussion is for you to apply your understanding of articulation and resonation to cleft lip/palate. This discussion is intended to allow you to show evidence that you have achieved the following Learning Outcomes:
Analyze physiology of communication (ILO3, PLO3)
Apply knowledge of anatomy and physiology of communication to diagnose and treat patients with communication disorders (ILO3, PLO3)
Describe the causes and treatment of a cleft lip and the effects of the condition of the production of speech sounds.
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