Medical Specialties Health Channel

Definition

Speech disorders refer to several conditions in which a person has difficulty communicating by mouth.

See also: Speech impairment

Alternative Names

Articulation deficiency; Voice disorders; Disfluency

Causes, incidence, and risk factors

Speech is one of the primary ways we communicate with those around us. It is an effective way to monitor normal growth and development as well as to identify potential problems.

Disfluencies are rhythm disorders that are usually characterized by the repetition of a sound, word, or phrase. Stuttering is perhaps the most serious disfluency.

Articulation deficiencies involve sounds made incorrectly or inappropriately.

Voice disorders involve abnormalities in the quality, pitch, and loudness of the sound.

There are many potential causes of speech impairment. The most common cause is mental retardation. Other causes may include:

• Attention deficit disorder (ADD)
• Autism
• Cerebral palsy
• Cleft palate
• Cri-du-chat syndrome
• Disorders of the palate
• Gilles de la Tourette syndrome
• Hearing impairment
• Learning disability
• Schizophrenia
• Vocal cord injury

Delayed speech development is one of the common symptoms of developmentally delayed children. It occurs in 5 - 10% of all children. Boys are three to four times as likely to have speech disorders as girls.

Symptoms

Disfluency:

• Repetition of sounds, words, or phrases after age 4
• Frustration with attempts to communicate
• Head jerking while talking
• Eye blinking while talking
• Embarrassment with speech

Articulation Deficiency:

• Unintelligible speech by age 3
• Leaves out consonants at the beginning of words by age 3
• Leaves out consonants at the end of words by age 4
• Persistent problems with articulation after age 7
• Leaves out sounds where they should occur
• Distorts sounds
• Substitutes an incorrect sound for a correct one

Voice disorders:

• Pitch deviations
• Deviations in the loudness and quality of the voice

Signs and tests

• Denver Articulation Screening Examination
• Early Language Milestone Scale
• Denver II
• Peabody Picture Test Revised

Treatment

The best treatment is prevention and early intervention by a speech pathologist. Speech training is an involved and time-consuming endeavor that can have profound results with consistent treatment.

Expectations (prognosis)

The prognosis depends on the cause of the disorder.