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Anterior Cingulate Pathways May Affect Emotions Through Orbitofrontal Cortex.

Miguel Á García-Cabezas1, Helen Barbas1

  • 1Department of Health Sciences, Boston University, Neural Systems Lab, 635 Commonwealth Ave., Boston, MA02215, USA.

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|September 23, 2016
PubMed
Summary
This summary is machine-generated.

Pathways from the anterior cingulate cortex (ACC) to the posterior orbitofrontal cortex (pOFC) show a feedforward communication pattern. This suggests a significant role in emotional and cognitive processes and their disruption in psychiatric disorders.

Keywords:
cerebral cortexconnection patternslaminar architectureprimate brainstructural model

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Area of Science:

  • Neuroscience
  • Neuroanatomy

Background:

  • The anterior cingulate cortex (ACC) and posterior orbitofrontal cortex (pOFC) are crucial for emotional regulation.
  • These phylogenetically old regions connect emotion and cognition areas, but their inter-regional communication patterns are unclear.

Purpose of the Study:

  • To elucidate the connectional pattern between ACC area 32 and the pOFC.
  • To understand the information flow and its implications for emotional and cognitive functions.

Main Methods:

  • Investigated pathways from ACC area 32 to pOFC using anatomical tracing.
  • Analyzed terminal size, synaptic targets (excitatory vs. inhibitory neurons), and laminar/areal distribution of projections.

Main Results:

  • ACC area 32 projects to all pOFC areas via large, efficient terminals.
  • Projections primarily target excitatory neurons and show a feedforward pattern from upper to middle-deep layers.
  • Terminations overlap with pOFC output pathways to the thalamus and amygdala.

Conclusions:

  • The ACC-pOFC pathway exhibits a feedforward communication structure.
  • This pathway likely influences downstream emotional and cognitive processing and may be implicated in psychiatric disorders.