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Regional gray matter density associated with cognitive reflectivity-impulsivity: evidence from voxel-based
Ryoichi Yokoyama1, Takayuki Nozawa2, Hikaru Takeuchi3
1Department of Functional Brain Imaging, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan; Japan Society for the Promotion of Science, Tokyo, Japan.
Plos One
|March 25, 2015
Summary
This study explored the brain's gray matter structure related to cognitive reflectivity and impulsivity. High cognitive reflectivity was linked to greater gray matter density in the ventral medial prefrontal cortex.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Brain Imaging
Background:
- Human decision-making involves cognitive reflectivity (slow, accurate) and cognitive impulsivity (fast, error-prone) strategies.
- Individual differences in these cognitive strategies are well-documented.
- The neural underpinnings of cognitive reflectivity and impulsivity traits remain largely unexplored.
Purpose of the Study:
- To investigate the association between cognitive reflectivity-impulsivity and gray matter structure in healthy adults.
- To identify specific brain regions modulated by individual differences in cognitive strategies.
Main Methods:
- Utilized voxel-based morphometry (VBM) on MRI scans.
- Administered a cognitive reflectivity-impulsivity questionnaire to 776 healthy, right-handed participants (432 males, 344 females; age 20.7 ± 1.8 years).
Main Results:
- A significant positive correlation was found between high cognitive reflectivity and increased gray matter density.
- This association was specifically localized to the ventral medial prefrontal cortex.
Conclusions:
- The ventral medial prefrontal cortex plays a crucial role in modulating cognitive reflectivity.
- Findings suggest a neuroanatomical basis for individual differences in cognitive strategy use.
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