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A connectionist approach to the prefrontal cortex

D R Weinberger1

  • 1National Institute of Mental Health, NIMH Neuroscience Center, St. Elizabeths, Washington, DC 20032.

The Journal of Neuropsychiatry and Clinical Neurosciences
|January 1, 1993
PubMed
Summary

The prefrontal cortex (PFC) has unique connections supporting executive functions, attention, and reward. Its complex connectivity explains why PFC dysfunction is common in various brain diseases.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • The prefrontal cortex (PFC) plays a crucial role in higher-order cognitive functions.
  • Understanding PFC's anatomical connectivity is key to comprehending its function in health and disease.

Purpose of the Study:

  • To review recent data on prefrontal cortex (PFC) anatomy and its relation to neuropsychological function.
  • To explore how PFC connectivity underlies executive functions, attention, and reward processing.
  • To categorize prefrontal dysfunction in disease states based on anatomical connectivity.

Main Methods:

  • Review of recent studies on human and animal prefrontal cortex (PFC).
  • Analysis of anatomical connectivity patterns of the PFC with intracortical and subcortical circuits.
  • Correlation of neuroimaging and neuropathology data with PFC dysfunction.

Main Results:

  • The PFC exhibits unique supramodal connectivity, enabling executive cognitive functions.
  • PFC connectivity modulates limbic and basal ganglia circuits, controlling attention and reward.
  • PFC dysfunction in disease states can be classified as intrinsic or dysconnection disorders.

Conclusions:

  • PFC's intricate connectivity is fundamental to conscious, goal-directed behavior.
  • Anatomical connectivity provides a framework for understanding prefrontal neuropsychology in health and disease.
  • Dysconnection disorders represent a significant category of prefrontal dysfunction.

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