Childhood Apraxia of Speech (CAS) is a motor speech disorder that is not due to
muscle weakness. The brain has difficulty planning the movements that need to
be executed by the mouth structures to result in speech. This results in
difficulty with making voluntary speech sounds and sequencing or stringing them
together in the correct order to make words. The child knows
what he/she wants to say, but his/her brain has problems with coordinating the
muscle movements necessary to produce those words.
Characteristics
of CAS include:
Early Development
·
slow and late development of speech skills
·
limited
early sound development; most vocal communication is in vowels only
·
limited
ability to imitate speech
·
frustration with
communication skills
·
use of
grunting and pointing as a main mode of communication beyond 18 months of age
·
words used a
few times and then never heard again
Speech Characteristics
·
unintelligible
speech
·
difficulty
positioning the mouth structures for speech sound production (“groping”)
·
inconsistency
of speech productions
·
difficulty
speaking “on demand”
Phonological Disorders:
A phonological disorder is difficulty with the patterns for combining
sounds clearly into speech. Find a description of phonological processes here.
1.
Language
Skills
Although their receptive language or
understanding is generally intact, children with apraxia usually have delayed
expressive language skills. Children with phonological disorders may have
expressive language skills closer to or within the normal range. While their
speech is mostly unintelligible, they use lots of words and try to combine them
into phrases and sentences.
2.
Copying
Abilities
Children
with apraxia usually have severe difficulties imitating speech sounds or mouth
movements, while children with phonological disorders can copy movements,
sounds or words, although their words might not be produced accurately.
3.
Consistency
of Errors
Children with phonological disorders are
generally consistent with their errors and exhibit patterns of errors, while
children with apraxia are very inconsistent. They could say a word correctly
once and then incorrectly a short while after.
4.
Vowel Sounds
Both children with phonological disorders and
apraxia have difficulties with consonant sounds, but children with apraxia also
substitute or sometimes omit vowel sounds too.
5.
Groping
Children
with apraxia often look like they are searching for the correct way to position
their mouths to form speech sounds.
It is
important to contact a speech- and language therapist if you are at all
concerned about your child’s speech development and –intelligibility.
For more information check out the following links:
The
Source for Childhood Apraxia of Speech (LinguiSystems)
http://www.asha.org/public/speech/disorders/childhoodapraxia.htm
http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Childhood_apraxia_of_speech
http://www.pammarshalla.com/blog/2011/08/differentiating-between-apraxia-and-severe-phonological-deficit/
http://teachmetotalk.com/2008/03/16/is-it-apraxia-or-a-phonological-processing-disorder-sorting-out-the-differences-in-toddlers-preschoolers-2/
http://testyyettrying.blogspot.com/2011/04/what-is-childhood-apraxia-of-speech-and.html
http://www.webmd.com/brain/apraxia-symptoms-causes-tests-treatments
Post by Elmien Truter