(B) Organic dysarthria Dysarthria occurs due to abnormal function of the morphology of the organ of articulation. 1, common causes a, congenital cleft lip and palate b, congenital cleft face b, megalingualism d, abnormal occlusion e, trauma to the morphological muscle function of the organ of articulation f, neurological disorders causing paralysis of the organ of articulation g, congenital palatopharyngeal closure insufficiency 2, the main speech symptoms A, nasopharyngeal closure insufficiency caused by: a, abnormal resonance, nasal phonation b, insufficient intraoral pressure, due to bursting, abrasive sounds required by the oral cavity Insufficient internal pressure due to distortion and omission of consonants c. Abnormal constructions B. Abnormal constructions not related to nasopharyngeal closure a. Palatalized constructions: caused by the backward movement of the construal point of the tongue tip b. Nasopharyngeal constructions: sounds emitted by exhalation of breath released from the nostrils when the back of the tongue is in contact with the soft palate c. Lateralized constructions: the tongue moves to the side and the exhalation is not from the central part of the tongue