Common causes of speech and language disorders:
- Hearing Loss
- Children who cannot hear sounds cannot learn to make them. Adults who can no longer hear some or all sounds may lose their ability to produce or understand sounds correctly.
- Inadequate muscle control
- Difficulty in controlling the movement of the tongue, lips, palate, and other speech organs may result in articulation disorders.
- Structural abnormalities
- Irregularities of facial structure, tongue or roof of the mouth, misaligned teeth, or a cleft lip or palate, (an opening between the nose and mouth cavities), may cause speech problems.
- Surgical removal of the larynx which is responsible for voice production.
- Growths on the vocal cords due to improper use of the voice may cause voice disorders.
- Brain injury
- Impairment of the central nervous system may influence:
Understanding written or spoken language.
Expressing written or spoken language.
Influence one's social interactions and perceptions.