Letter selection and letter assembly in acquired dysgraphia.
Cogn Behav Neurol
; 19(4): 225-36, 2006 Dec.
Article
em En
| MEDLINE
| ID: mdl-17159621
ABSTRACT
OBJECTIVE:
We explored the constituents of the graphemic buffer in a patient with acquired dysgraphia and tested the hypothesis that the graphemic buffer is composed of 2 dissociable components letter selection and letter assembly.BACKGROUND:
Research on dysgraphia has established the graphemic buffer as a component of the spelling mechanism, and the buffer is considered a short-term memory store that is critical for letter production. However, little is known about the components within the buffer.METHOD:
We devised 2 spelling tasks that rely differentially on letter selection and letter assembly. In the selection task, our patient produced the letters that composed a target word, but she did not have to provide serial position information. In the assembly task, B.H. was given all the letters of a target word and was asked to spell the word by arranging the letters in the proper serial order.RESULTS:
Compared to spelling to dictation, our patient did not benefit from being given letter identity information (ie, assembly task), but her performance improved significantly when position information was available (ie, selection task).CONCLUSIONS:
Based on these data, and the comparison of her performance with another dysgraphic patient, we propose that the graphemic buffer engages in both letter selection and letter assembly.
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Bases de dados:
MEDLINE
Assunto principal:
Reconhecimento Visual de Modelos
/
Comportamento Verbal
/
Aprendizagem Verbal
/
Agrafia
Tipo de estudo:
Prognostic_studies
Limite:
Aged
/
Female
/
Humans
Idioma:
En
Revista:
Cogn Behav Neurol
Assunto da revista:
NEUROLOGIA
/
PSICOLOGIA
/
PSIQUIATRIA
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Estados Unidos