Emotional processing in anterior cingulate and medial prefrontal cortex.

Area of Science:

• Neuroscience
• Affective Science
• Cognitive Neuroscience

Background:

• Negative emotional stimuli activate widespread brain networks, including the medial prefrontal cortex (mPFC) and anterior cingulate cortex (ACC).
• A traditional view proposed distinct cognitive (dorsal-caudal) and affective (ventral-rostral) subdivisions within these regions.

Purpose of the Study:

• To review recent research on the roles of mPFC and ACC subdivisions in processing negative emotions.
• To challenge the traditional dichotomy and propose a revised framework for understanding their functions.

Main Methods:

• Comprehensive review of existing scientific literature on negative emotions, particularly fear and anxiety.
• Analysis of studies involving both animal models and human subjects.

Main Results:

• Contrary to the traditional dichotomy, both dorsal-caudal and ventral-rostral subdivisions of the mPFC and ACC contribute significantly to emotional processing.
• Dorsal-caudal regions are involved in the appraisal and expression of negative emotions.
• Ventral-rostral regions play a regulatory role, modulating limbic regions involved in emotional generation.

Conclusions:

• The traditional dichotomy of mPFC and ACC subdivisions in emotional processing is an oversimplification.
• A revised framework suggests overlapping roles, with dorsal regions for appraisal/expression and ventral regions for regulation.
• This new framework aligns with emerging data on both negative and positive emotions.