Ansiedade social e assimetria de ondas alfa do lobo frontal em eletroencefalograma (EEG): uma revisão sistemática

Thainá França de Oliveira Duarte

Universidade Federal da Paraíba (UFPB) Brasil

Ighor Domingos Bandeira

Universidade Federal da Paraíba (UFPB) Brasil

Luiz Carlos Serramo Lopez

Universidade Federal da Paraíba (UFPB) Brasil

Resumo

O Transtorno de Ansiedade Social (TAS) é caracterizado por um medo excessivo de julgamento em situações sociais. Uma das alterações fisiológicas que pode estar presente nesse quadro é a assimetria de ondas alfa no lobo frontal do córtex cerebral. A presente revisão foi realizada a partir de uma busca por estudos que relacionam TAS e assimetria de alfa através da ferramenta de busca Google Acadêmico. Os descritores usados foram “social anxiety”, “alpha waves”, “brain waves asymmetry”, “alpha asymmetry”, “frontal lobe” e “EEG asymmetry”. No total, oito estudos atendiam aos critérios da busca e estão detalhados neste artigo. De modo geral, artigos corroboram a ideia de que ansiedade social se relaciona à predominância de ondas alfa no hemisfério esquerdo. O mecanismo causal por trás desse padrão seria a inativação, associada a ondas alfa, do córtex pré-frontal esquerdo, que teria um importante papel na regulação emocional dos estados de ansiedade. A assimetria frontal de ondas alfa pode, portanto, vir a se tornar um parâmetro útil para diagnóstico e monitoramento dos quadros de TAS. Sugestões para futuras pesquisas são feitas a partir da detecção de algumas deficiências presentes nos estudos atuais.

Palavras-chave


córtex cerebral; fobia social; ondas cerebrais


Texto completo:

Referências


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DOI: http://dx.doi.org/10.18265/1517-0306a2021id4972

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