Embodied neural responses to others' suffering

Area of Science:

• Neuroscience
• Social Psychology
• Cognitive Science

Background:

• Facial mimicry, the automatic imitation of observed facial expressions, is hypothesized to play a role in empathy.
• Previous research suggests a link between observing others' emotions and one's own neural responses, but the causal role of mimicry and its modulation by social factors like race remain unclear.

Purpose of the Study:

• To investigate the causal role of facial mimicry in observers' neural responses to others' pain expressions.
• To examine how facial mimicry influences early event-related potentials (ERPs) associated with empathy.
• To explore whether racial group membership moderates the relationship between facial mimicry and empathic neural responses.

Main Methods:

• Recorded event-related potentials (ERPs) from Chinese adults viewing Asian and Caucasian faces displaying pain and neutral expressions.
• Manipulated facial mimicry by comparing a relaxed condition with a condition where participants held a pen horizontally to block facial muscle movements.

Main Results:

• Pain expressions elicited a larger frontal N1 component (100-120 ms) compared to neutral expressions.
• The modulation of the N1 component by facial expressions was significantly reduced when facial mimicry was blocked compared to the relaxed condition.
• This reduction in N1 modulation due to blocked mimicry was observed for Asian faces but not for Caucasian faces.

Conclusions:

• Facial mimicry plays a causal role in the early neural processing of observed pain.
• Embodied empathic responses, mediated by facial mimicry, are influenced by racial intergroup dynamics.
• The findings highlight the complex interplay between automatic mimicry, empathy, and social-cognitive factors like race.