Neural dynamics of the intention to speak.
Cereb Cortex
; 20(8): 1891-7, 2010 Aug.
Article
em En
| MEDLINE
| ID: mdl-20008453
ABSTRACT
When we talk we communicate our intentions. Although the origin of intentional action is debated in cognitive neuroscience, the question of how the brain generates the intention in speech remains still open. Using magnetoencephalography, we investigated the cortical dynamics engaged when healthy subjects attended to either their intention to speak or their actual speech. We found that activity in the right and left parietal cortex increased before subjects became aware of intending to speak. Within the time window of parietal activation, we also observed a transient left frontal activity in Broca's area, a crucial region for inner speech. During attention to speech, neural activity was detected in left prefrontal and temporal areas and in the temporoparietal junction. In agreement with previous results, our findings suggest that the parietal cortex plays a multimodal role in monitoring intentional mechanisms in both action and language. The coactivation of parietal regions and Broca's area may constitute the cortical circuit specific for controlling intentional processes during speech.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Fala
/
Comportamento Verbal
/
Volição
/
Função Executiva
/
Idioma
/
Rede Nervosa
Limite:
Humans
Idioma:
En
Revista:
Cereb Cortex
Assunto da revista:
CEREBRO
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
França