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Related Experiment Video

Updated: Dec 14, 2025

Continuous Theta Burst Stimulation of the Posterior Medial Frontal Cortex to Experimentally Reduce Ideological Threat Responses
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Social Behavior Is Modulated by Valence-Encoding mPFC-Amygdala Sub-circuitry.

Wen-Chin Huang1, Aya Zucca2, Jenna Levy1

  • 1Department of Neuroscience, The Scripps Research Institute, Jupiter, FL, USA; Doctoral Program in Chemical and Biological Sciences, The Skaggs Graduate School of Chemical and Biological Sciences at Scripps Research, Jupiter, FL, USA.

Cell Reports
|July 16, 2020
PubMed
Summary

Specific medial prefrontal cortex (mPFC) circuits projecting to the basolateral amygdala (BLA) are crucial for social approach-avoidance behavior. These mPFC-BLA pathways process social cues and emotional valence to modulate social interactions.

Keywords:
BLAchemogeneticsemotional valenceinfralimbicmPFCmPFC-BLA circuitryoptogeneticsprelimbicsocial preference

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Area of Science:

  • Neuroscience
  • Social Behavior
  • Emotional Processing

Background:

  • The medial prefrontal cortex (mPFC) and amygdala are key brain regions involved in processing social information and emotional valence.
  • The specific sub-circuits within the mPFC that project to the basolateral amygdala (BLA) and their role in social approach-avoidance behavior remain unclear.

Purpose of the Study:

  • To investigate whether specific mPFC-BLA sub-circuits are recruited during social interactions.
  • To determine the functional contribution of these mPFC-BLA circuits to social approach-avoidance behavior.

Main Methods:

  • Utilized retrograde labeling to identify mPFC neurons projecting to the BLA.
  • Employed chemogenetics and optogenetics to manipulate specific mPFC-BLA sub-circuits.
  • Assessed social approach-avoidance behavior and emotional states using behavioral paradigms like real-time place preference.

Main Results:

  • BLA-projecting neurons in the infralimbic cortex (IL) showed preferential activation to social cues compared to prelimbic cortex (PL) neurons.
  • Activating PL-BLA or inhibiting IL-BLA circuits impaired social behavior.
  • Sustained activation of PL-BLA circuitry led to social impairment and avoidance, indicating a negative emotional state.

Conclusions:

  • These findings reveal a circuit-level mechanism in the mPFC-BLA pathways that shapes social approach-avoidance behavior.
  • Valence-encoding sub-circuits within the mPFC-BLA are critical for modulating social interactions and emotional responses.