Beta coherence within human ventromedial prefrontal cortex precedes affective value choices

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Affective Neuroscience

Background:

• The ventromedial prefrontal cortex (vmPFC) is crucial for assigning value to sensory information and integrating motivation with cognition.
• Its network function may involve synchronized neural activity, but specific synchronization patterns within the vmPFC are not well understood.

Purpose of the Study:

• To investigate whether the vmPFC exhibits functionally specific synchronization patterns during affective valuation.
• To identify neural signatures associated with subjective judgments of emotional valence.

Main Methods:

• Electrophysiological recordings were conducted in the human subcallosal vmPFC.
• Participants performed an emotion tracking task involving ambiguous facial expressions.

Main Results:

• vmPFC showed low beta-band (15-20 Hz) coherent activity preceding negative ('sad') judgments of ambiguous faces, but not positive ('happy') judgments.
• This beta coherence was more pronounced for conflicting emotional cues and persisted after the decision.
• The findings suggest a specific neural marker for affective valuation.

Conclusions:

• Coherent 15-20 Hz activity in the vmPFC serves as a functional signature of the valuation process guiding affective choices.
• Altered beta-band coherence may reflect dysfunctional affective valuation and decision conflict, potentially serving as an index in clinical depression.