Basal ganglia structures differentially contribute to verbal fluency: evidence from Human Immunodeficiency Virus (HIV)-infected adults.
Neuropsychologia
; 50(3): 390-5, 2012 Feb.
Article
em En
| MEDLINE
| ID: mdl-22223078
ABSTRACT
BACKGROUND:
The basal ganglia (BG) are involved in executive language functions (i.e., verbal fluency) through their connections with cortical structures. The caudate and putamen receive separate inputs from prefrontal and premotor cortices, and may differentially contribute to verbal fluency performance. We examined BG integrity in relation to lexico-semantic verbal fluency performance among older HIV infected adults.METHOD:
20 older (50+ years) HIV+ adults underwent MRI and were administered measures of semantic and phonemic fluency. BG (caudate, putamen) regions of interest were extracted.RESULTS:
Performance on phonemic word generation significantly predicted caudate volume, whereas performance on phonemic switching predicted putamen volume.CONCLUSIONS:
These findings suggest a double dissociation of BG involvement in verbal fluency tasks with the caudate subserving word generation and the putamen associated with switching. As such, verbal fluency tasks appear to be selective to BG function.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Putamen
/
Fala
/
Gânglios da Base
/
Núcleo Caudado
/
Infecções por HIV
Tipo de estudo:
Prognostic_studies
Limite:
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article