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Related Experiment Videos

Structural and functional dichotomy of human midcingulate cortex.

Brent A Vogt1, Gail R Berger, Stuart W G Derbyshire

  • 1Cingulum NeuroSciences Institute and Cingulate NeuroTherapeutics, 4435 Stephanie Drive, Manlius, NY 13104, USA. vogtb@upstate.edu

The European Journal of Neuroscience
|December 6, 2003
PubMed
Summary

The anterior cingulate cortex (aMCC) is linked to pain and fear, while other regions process emotions differently. This study reveals distinct morphological and functional differences within the midcingulate cortex (MCC).

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Area of Science:

  • Neuroscience
  • Neuroanatomy
  • Brain Function

Background:

  • The anterior cingulate cortex (ACC) is divided into perigenual and midcingulate regions.
  • Understanding the specific roles and structures of these ACC subregions is crucial for neuroscience.
  • Previous research suggests distinct functions for ACC subregions, but detailed morphological and functional correlations are needed.

Purpose of the Study:

  • To investigate the morphological differences between the anterior (aMCC) and posterior (pMCC) midcingulate cortex.
  • To correlate these structural variations with pain and emotion processing functions.
  • To elucidate the functional dichotomy within the midcingulate cortex.

Main Methods:

  • Human cingulate gyri were analyzed using Nissl staining and immunoreactions for neuron-specific nuclear binding protein and intermediate neurofilament proteins (NFP).

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  • Morphological features, including layer differentiation and neuron density, were examined.
  • Brain activity related to pain and emotion was assessed using functional imaging in standard coordinates.

    • Main Results:

    • Distinct morphological differences were observed: aMCC has a poorly differentiated layer III, while pMCC features a dense layer Va with intermingled neuron sizes.
    • NFP-positive neuron density in layer Vb was higher in pMCC than in aMCC.
    • Functional imaging showed aMCC activation coupled with pain and fear, while other MCC regions were not consistently activated by emotions or pain.

    Conclusions:

    • The midcingulate cortex (MCC) exhibits a functional duality, with the anterior part (aMCC) specifically involved in pain and fear processing.
    • Morphological distinctions, particularly in layer Va and Vb neuron density, support the functional segregation of MCC subregions.
    • The selective involvement of aMCC in pain and fear suggests its vulnerability in chronic pain and stress-related disorders.