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.

Santarnecchi, E., Sprugnoli, G., Bricolo, E., Costantini, G., Liew, S., Musaeus, C., et al. (2019). Gamma tACS over the temporal lobe increases the occurrence of Eureka! moments. SCIENTIFIC REPORTS, 9(1), 5778 [10.1038/s41598-019-42192-z].

Gamma tACS over the temporal lobe increases the occurrence of Eureka! moments

Bricolo, E;Costantini, G;Salvi, C;
2019

Abstract

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.
Articolo in rivista - Articolo scientifico
tACS; Creativity; Compound Remote Associate problems
English
2019
9
1
5778
5778
open
Santarnecchi, E., Sprugnoli, G., Bricolo, E., Costantini, G., Liew, S., Musaeus, C., et al. (2019). Gamma tACS over the temporal lobe increases the occurrence of Eureka! moments. SCIENTIFIC REPORTS, 9(1), 5778 [10.1038/s41598-019-42192-z].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/237364
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