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Related Experiment Video

Updated: May 30, 2026

Online Repetitive Transcranial Magnetic Stimulation of Dorsomedial and Dorsolateral Prefrontal Cortex in Cognition Decision Making, and Cognitive Dissonance
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Different types of target probability have different prefrontal consequences.

Nicholas Hon1, Jeffrey Ong, Rebecca Tan

  • 1Department of Psychology, National University of Singapore, 9 Arts Link, S117570, Singapore. psyhonn@nus.edu.sg

Neuroimage
|August 2, 2011
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Summary

Different ways of manipulating target probability impact brain activity differently. Global probability changes affect the ventrolateral prefrontal cortex and insula, while specific target probability changes modulate the dorsolateral prefrontal cortex.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Brain Imaging

Background:

  • Target detection is influenced by target probability.
  • Target probability can be manipulated using various methods.
  • Understanding these manipulations is crucial for characterizing frontal lobe engagement.

Purpose of the Study:

  • To investigate the distinct neural effects of two common target probability manipulations on frontal cortex activity.
  • To differentiate the neural consequences of global stimulus class probability versus specific target likelihood.

Main Methods:

  • Examined neural activity using functional neuroimaging techniques.
  • Compared the effects of global stimulus class probability manipulation.
  • Assessed the impact of specific target stimulus likelihood manipulation.

Main Results:

  • Global stimulus class probability changes significantly modulated activity in the ventrolateral prefrontal cortex and insula.
  • Manipulations of specific target likelihood did not affect these regions.
  • Specific target likelihood manipulations primarily modulated activity in the dorsolateral prefrontal cortex and precentral sulcus.

Conclusions:

  • Different types of target probability manipulations yield distinct neural consequences.
  • Ventral and dorsal prefrontal cortex regions exhibit differential responses to varying types of task-relevant information.