Publicado may 18, 2017



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Felipe Oliveira

Cleanto R Rego Fernandes

Mario André Miguel

John Fontenele Araujo

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Resumen

Existem evidências que apontam para a importância do córtex préfrontal dorsolateral (CPFDL) na percepção de intervalos de tempo. A ETCC (eletroestimulação transcraniana por corrente contínua) modula a excitabilidade cortical, podendo ser utilizada para influenciar o desempenho de diferentes funções cerebrais, como a estimativa de tempo. Nosso objetivo foi avaliar o efeito da estimulação do CPFDL direito e esquerdo sobre a reprodução de intervalos de tempo. 26 indivíduos foram submetidos a estimulação transcraniana de 2mA no CPFDL por 20 min (anódica, catódica ou sham). Em seguida, participaram de uma tarefa de reprodução de intervalos de tempo de 4 e 8 segundos. Através de ANOVA para medidas repetidas para os fatores estimulação (anódica, catódica, sham), Intervalos (4s e/ou 8s) e local (esquerdo e direito), pudemos observar que a estimulação anódica do CPFDL do hemisfério direito resultou em subestimativa maior no intervalo de 4 segundos, enquanto o uso de corrente catódica sobre o CPFDL esquerdo provocou uma superestimativa do tempo para o intervalo de 4 segundos. Nossos resultados corroboram a importância do CPFDL direito na percepção de tempo. Ainda, o efeito assimétrico observado é interessante, confirmando que o CPFDL esquerdo está associado às funções executivas, importantes na percepção de tempo.

Keywords

Time perception, interval timing, DLPFC, tDCSPercepção de tempo, intervalo de tempo, pré-frontal dorsolateral, ETCC

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Cómo citar
Oliveira, F., Rego Fernandes, C. R., Miguel, M. A., & Araujo, J. F. (2017). Efeito da estimulação transcraniana por corrente continua (ETCC) no córtex pré- frontal dorsolateral sobre a reprodução de intervalo de tempo. Universitas Psychologica, 15(5). https://doi.org/10.11144/Javeriana.upsy15-5.eetc
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