Mismatch negativity responses in children with a diagnosis of childhood apraxia of speech (CAS).
Am J Speech Lang Pathol
; 21(4): 302-12, 2012 Nov.
Article
em En
| MEDLINE
| ID: mdl-22564903
ABSTRACT
PURPOSE:
To evaluate whether a hypothesis suggesting that apraxia of speech results from phonological overspecification could be relevant for childhood apraxia of speech (CAS).METHOD:
High-density EEG was recorded from 5 children with CAS and 5 matched controls, ages 5-8 years, with and without CAS, as they listened to randomized sequences of CV syllables in two oddball paradigms phonemic (/ba/, /pa/) and allophonic (/pa/, /p(h)a/).RESULTS:
In the phonemic contrast condition, mismatch negativity (MMN) responses to oddball sounds were observed for the typically developing (comparison) group but not the CAS group, although a component similar to an immature mismatch response was apparent. The allophonic contrast did not elicit MMN responses in the comparison group, but in the CAS group, an MMN-like response was observed.CONCLUSION:
The authors propose that these preliminary findings are consistent with a view of CAS as a disorder that not only affects motor planning but also has a phonological component.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Apraxias
/
Distúrbios da Fala
/
Percepção da Fala
/
Encéfalo
/
Potenciais Evocados Auditivos
Tipo de estudo:
Clinical_trials
/
Diagnostic_studies
Idioma:
En
Revista:
Am J Speech Lang Pathol
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Estados Unidos