Increasing breadth of semantic associations with left frontopolar direct current brain stimulation: a role for individual differences.
Neuroreport
; 26(5): 296-301, 2015 Mar 25.
Article
en En
| MEDLINE
| ID: mdl-25714417
ABSTRACT
The aim of this study was to evaluate the influence of left frontopolar versus auditory (control) cortex transcranial direct current stimulation (tDCS) on the breadth of semantic associations produced in a cued free association task. A within-participants design administered anodal tDCS over the left frontopolar or auditory cortex, centered at electrode site AFZ or T7 using a 4×1 targeted stimulation montage. During stimulation, participants produced free associates in response to cues designed to promote narrow, moderate, or broad semantic associations. We measured the latent semantic associative strength of generated words relative to cues. The cue manipulation produced expected effects on the associative breadth of generated words, but there was no main effect of stimulation site, and calculated Bayes factors showed strong support for the null hypothesis. However, individual differences in creative potential, as assessed by the remote associates test, reliably and positively predicted increases in associative breadth under the frontopolar versus the auditory control condition, but only in response to narrow cues. In conclusion, the present data support neuroimaging studies demonstrating the involvement of left frontopolar cortical regions in generating relatively broad semantic associations. They also provide novel evidence that individual differences in creative potential may modulate the influence of brain stimulation on the breadth of generated semantic associations.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Semántica
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Corteza Auditiva
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Señales (Psicología)
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Lóbulo Frontal
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Individualidad
Tipo de estudio:
Prognostic_studies
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Risk_factors_studies
Límite:
Adult
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Female
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Humans
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Male
Idioma:
En
Año:
2015
Tipo del documento:
Article