Electrophysiological correlates of spatial orienting towards angry faces: a source localization study

Area of Science:

• Cognitive Neuroscience
• Social Psychology
• Electrophysiology

Background:

• Involuntary attention to threat is crucial for survival.
• Previous research suggests rapid processing of emotional faces.
• Understanding attentional biases toward negative social cues is important.

Purpose of the Study:

• To investigate behavioral and electrophysiological markers of involuntary attention to angry faces.
• To explore the neural mechanisms underlying orienting to threat cues.
• To examine the role of the P1 component in attentional bias.

Main Methods:

• Dot-probe task with high-density event-related potentials (ERPs).
• Distributed source localization technique applied to ERP data.
• Analysis of behavioral responses (reaction time) and electrophysiological components (C1, P1, N170).

Main Results:

• Participants displayed hypervigilance to angry faces, evidenced by faster reaction times and an enhanced P1 component.
• Source localization revealed increased anterior cingulate cortex activity for angry faces.
• No modulation of C1 or N170 components by emotional expression was observed.

Conclusions:

• The P1 component is the earliest indicator of spatial attention modulation by emotional face stimuli.
• Attentional orienting toward threat cues involves the anterior cingulate cortex.
• Findings provide insights into the neural basis of threat detection and social disapproval.