Stuttering is a speech disorder in which the flow of speech is interrupted by:

  • Repetition or prolongation of sounds, words, or syllables
  • An inability to begin a word

In an attempt to speak, the person who is stuttering may:

  • Frequently blink the eyes
  • Have abnormal facial or upper body movements

The cause of stuttering is not completely understood. Some experts have suggested that stuttering may occur when:

  • A child's ability to speak does not match his verbal demands
  • There are psychological factors in a child’s life such as mental illness, extreme stress
  • Problems occur in the connections between muscles, nerves, and areas of the brain that control speech
  • There are problems in the part of the brain that controls the timing of speech muscle activation

Muscles and Nerves Involved in Speech
Tongue Innervation
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