![]() Abnormalities of the vocal cords such as inflammation, polyps, cysts, and tumors can affect the pitch and quality of the voice.Ī number of different types of speech impediments can occur, and many terms have been used to qualify speech disorders. ![]() ![]() Some conditions that affect speech are present at birth (such as inborn muscular conditions and congenital anatomical abnormalities), while others are the result of metabolic diseases, infections, tumors, or injury. Likewise, muscular diseases and conditions that affect the jaws, teeth, and mouth can impair speech. Difficulty with speech can be the result of problems with the brain or nerves that control the facial muscles, larynx, and vocal cords necessary for speech.
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