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Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning
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Cognitive style, cortical stimulation, and the conversion hypothesis.

David J M Kraemer1, Roy H Hamilton2, Samuel B Messing1

  • 1Department of Psychology, University of Pennsylvania Philadelphia, PA, USA.

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|February 14, 2014
PubMed
Summary
This summary is machine-generated.

Individuals with a verbal cognitive style convert nonverbal information into words. Disrupting the left supramarginal gyrus (SMG) with repetitive transcranial magnetic stimulation (rTMS) impaired this verbal conversion strategy.

Keywords:
cognitive stylesconversion hypothesisfMRIrTMSverbalizer

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Area of Science:

  • Cognitive Neuroscience
  • Psychology

Background:

  • Cognitive styles are viewed as underlying cognitive strategies.
  • The conversion hypothesis suggests individuals with a verbal cognitive style translate nonverbal information into the verbal domain.

Purpose of the Study:

  • To investigate the role of the left supramarginal gyrus (SMG) in the verbal cognitive style.
  • To test the conversion hypothesis by disrupting the hypothesized verbal conversion strategy.

Main Methods:

  • Used functional magnetic resonance imaging (fMRI) to identify subject-specific left SMG activity peaks.
  • Applied repetitive transcranial magnetic stimulation (rTMS) to these left SMG targets to disrupt neural activity.
  • Assessed performance on a task requiring the conversion of visual information (pictures) into verbal labels.

Main Results:

  • Left SMG stimulation significantly impaired performance in converting pictures to verbal labels.
  • The degree of performance impairment was correlated with an individual's predisposition to a verbal cognitive style.
  • These findings support the involvement of the left SMG in verbal labeling strategies.

Conclusions:

  • The left supramarginal gyrus plays a crucial role in the verbal cognitive style.
  • The study provides evidence supporting the conversion hypothesis for cognitive styles, highlighting the brain's mechanisms for processing information across different domains.