Rehabilitation Sciences 3061A/B Lecture : Disorders of Speech

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Child causes: y structural abnormalities y faulty learning y. Adult causes: y residual childhood errors y damage to cns: dysarthria, apraxia, mutism. Substitutions y she put her toofbursh and toofpaste in the bafroom y substitute letters for others. Distortions y she has a sexy smile y drop sides of tongue, let air come out sides. Patterns of errors: y systematic simplifications beyond expected time y apply a rule (above) to a whole bunch of sounds y pattern is mainted longer than usual y may contribute to later difficulties in learning to read. Dysarthria: y speech problem due to muscle weakness: muscle tone too high, too low y to damage to or imperfect development of cns y occurs in utero, at birth, or up to yrs after birth. Apraxia: y volitional problem unreliable motor pathway y brain knows exactly what they want but pathway doesn t allow it.

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