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Updated: May 12, 2026

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
Published on: February 23, 2020
Differences in intrinsic functional organization between dorsolateral prefrontal and posterior parietal cortex.
Fumi Katsuki1, Xue-Lian Qi1, Travis Meyer1
1Department of Neurobiology and Anatomy, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
The study reveals distinct functional organization in the dorsolateral prefrontal cortex and posterior parietal cortex. Posterior parietal cortex shows stronger, more localized neural connectivity, crucial for attention and working memory.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
Background:
- The dorsolateral prefrontal cortex and posterior parietal cortex are key brain regions for attention, working memory, and executive functions.
- Understanding their anatomical organization is crucial for explaining functional specialization.
Purpose of the Study:
- To investigate the intrinsic functional connectivity within the dorsolateral prefrontal cortex and posterior parietal cortex.
- To determine how anatomical organization relates to functional specialization in these areas.
Main Methods:
- Simultaneous neural recordings from monkeys performing working memory tasks.
- Cross-correlation analyses to measure effective connectivity between neurons.
- Analysis of connectivity strength as a function of distance between neurons.
Main Results:
- Effective connectivity decreased with increasing distance between neurons in both areas.
- Posterior parietal cortex exhibited stronger and more localized connectivity than the prefrontal cortex.
- Connectivity differences were independent of firing rates and stimulus selectivity.
Conclusions:
- The dorsolateral prefrontal cortex and posterior parietal cortex possess unique intrinsic functional organizations.
- These distinct organizations support their specialized roles in cognitive functions like working memory.
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