Therefore, we must first determine the cause, find out the source of pronunciation defects of dysarthria, and thus formulate scientific and effective correction programs. Possible reasons:
1, the cause of lingual frenulum. Tongue lacing can make the tongue move freely, and the tip of the tongue can naturally extend out of the mouth or lick up to the upper gum. However, due to the short lingual frenulum, the movement of the tongue is limited, and it is impossible to make a flat tongue sound and an upturned tongue sound.
2. Oral cleft palate. When the normal person's palate and pharynx are closed, it is necessary to lift the soft palate, cooperate with the contraction of the surrounding muscles, close the passage between the oral cavity and the nasal cavity, and make the airflow swirl in the oral cavity to produce various languages. However, patients with cleft lip and palate often have longitudinal cracks in the palate, and the palatopharyngeal cavity cannot be completely closed, which leads to air leakage, strong wind, poor sound quality, wrong pronunciation and difficulty in understanding. If patients with cleft lip and palate can't get plastic surgery in time and can't speak clearly for a long time, they will have to pronounce with abnormal pronunciation methods, which will result in a cleft palate language that is more difficult to understand in adulthood.