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Gamma tACS over the temporal lobe increases the occurrence of Eureka! moments.
Santarnecchi, Emiliano; Sprugnoli, Giulia; Bricolo, Emanuela; Costantini, Giulio; Liew, Sook-Lei; Musaeus, Christian S; Salvi, Carola; Pascual-Leone, Alvaro; Rossi, Alessandro; Rossi, Simone.
Afiliação
  • Santarnecchi E; Berenson-Allen Center for Non-Invasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA. esantarn@bidmc.harvard.edu.
  • Sprugnoli G; Brain Investigation & Neuromodulation Laboratory (Si-BIN Lab), Department of Medicine, Surgery and Neuroscience, Unit of Neurology and Clinical Neurophysiology, University of Siena, Siena, Italy. esantarn@bidmc.harvard.edu.
  • Bricolo E; Brain Investigation & Neuromodulation Laboratory (Si-BIN Lab), Department of Medicine, Surgery and Neuroscience, Unit of Neurology and Clinical Neurophysiology, University of Siena, Siena, Italy.
  • Costantini G; Psychology Department, University of Milano-Bicocca, Milan, Italy.
  • Liew SL; Milan Center for Neuroscience, Milan, Italy.
  • Musaeus CS; Psychology Department, University of Milano-Bicocca, Milan, Italy.
  • Salvi C; Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA, USA.
  • Pascual-Leone A; Department of Neurology, Danish Dementia Research Centre (DDRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
  • Rossi A; Northwestern University, Psychology department, Evanston, IL, USA.
  • Rossi S; Rehabilitation Institute of Chicago, Chicago, IL, USA.
Sci Rep ; 9(1): 5778, 2019 04 08.
Article em En | MEDLINE | ID: mdl-30962465
The solution to a problem might manifest itself as a burst of unexpected, unpredictable clarity. Such Eureka! events, or Insight moments, are among the most fascinating mysteries of human cognition, whose neurophysiological substrate seems to include a role for oscillatory activity within the α and γ bands in the right parietal and temporal brain regions. We tested this hypothesis on thirty-one healthy participants using transcranial Alternating Current Stimulation (tACS) to externally amplify α (10 Hz) and γ (40 Hz) activity in the right parietal and temporal lobes, respectively. During γ-tACS over the right temporal lobe, we observed an increase in accuracy on a verbal insight task. Furthermore, electroencephalography (EEG) data revealed an increase in γ spectral power over bilateral temporal lobes after stimulation. Additionally, resting-state functional MRI data acquired before the stimulation session suggested a correlation between behavioral response to right temporal lobe tACS and functional connectivity of bilateral temporal lobes, in line with the bilateral increase in γ band revealed by EEG. Overall, results suggest the possibility of enhancing the probability of generating Eureka! moments in humans by means of frequency-specific noninvasive brain stimulation.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Resolução de Problemas / Lobo Temporal / Ritmo alfa / Ritmo Gama Limite: Adult / Female / Humans / Male Idioma: En Revista: Sci Rep Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Resolução de Problemas / Lobo Temporal / Ritmo alfa / Ritmo Gama Limite: Adult / Female / Humans / Male Idioma: En Revista: Sci Rep Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Reino Unido