Estratégias de clustering e switching na evocação lexical de adultos após acidente vascular cerebral nos hemisférios direito e esquerdo

Abstract

Se comparó el número total de palabras producidas, el número de clusters y switches y la media del tamaño de clusters en fluencia verbal con criterio semántico y ortográfico, y el desempeño entre estas tareas en cada uno de los grupos. Se analizaron correlaciones entre estas variables y datos sociodemográficos. En la muestra hubo 43 adultos con lesión cerebrovascular (11 con lesión en el hemisferio cerebral derecho - lhd, 32 con lesión en el hemisferio cerebral izquierdo - lhe) y 40 adultos neurológicamente saludables. Los resultados principales indicaron un mayor número de palabras producidas, número de clusters y switches en ambas tareas de fluencia verbal en los adultos del grupo control en comparación con el grupo con lhe, pero un rendimiento similar en el grupo con lhd. En la tarea con criterio ortográfico, el grupo con lhd produjo mayor número de palabras, clusters y switches que el grupo con lhe. Los grupos presentaron mejor desempeño en fluencia verbal semántica en comparación con la ortográfica. Análisis cualitativos permitieron identificar procesos cognitivos distintos en fluencia verbal después de lesión cerebrovascular unilateral.Palabras clave: accidente cerebrovascular, fluencia verbal, funciones ejecutivas, evaluación neuropsicológica.

Qualitative and quantitative aspects of the F-A-S fluency test in people with aphasia

“…22 In addition, the low educational level of the participants could also have interfered with the results (all participants, except one, had less than 11 years of formal education), as observed in a study of post-stroke patients with low schooling. 15 The mean total number of words found in this study was similar to that of a previous study that investigated the performance of PWA on the F-A-S test, in which the mean and SD were 3.2 and 4.5. 22 The reduced number of words generated in the PVF test by PWA might be associated with impaired access to the phonological lexicon, as processing occurs in the left brain hemisphere, 15 often damaged in these patients.…”

“…Firstly, the mean number of words generated by the participants was considerably lower than the mean scores of previous studies carried out with healthy adult and older Brazilians (25.4 to 43.5). 2,9,28 This result can be attributed to brain injury in the left hemisphere 15 but mainly to the aphasic condition. 22 In addition, the low educational level of the participants could also have interfered with the results (all participants, except one, had less than 11 years of formal education), as observed in a study of post-stroke patients with low schooling.…”

“… 22 In addition, the low educational level of the participants could also have interfered with the results (all participants, except one, had less than 11 years of formal education), as observed in a study of post-stroke patients with low schooling. 15 …”

“… 2 , 8 , 9 Despite being a widely used procedure, few studies have investigated the performance of PWA on the PVF task specifically regarding the use of cognitive strategies. 4 , 5 , 15 Recent investigations analyzing the use of these strategies in PVF tests did not involve PWA 4 , 5 or used diagnostic criteria that did not clearly differentiate aphasic from non-aphasic groups. 15 The quantitative and qualitative analysis of the performance of aphasic individuals on the PVF test can contribute to a better understanding of cognitive changes in this group of patients.…”

“… 4 , 5 , 15 Recent investigations analyzing the use of these strategies in PVF tests did not involve PWA 4 , 5 or used diagnostic criteria that did not clearly differentiate aphasic from non-aphasic groups. 15 The quantitative and qualitative analysis of the performance of aphasic individuals on the PVF test can contribute to a better understanding of cognitive changes in this group of patients. Besides, the PVF performance of PWA is possibly different and may not be extended to other populations referred to clinical neuropsychological assessments.…”