Brain activity was monitored while 36 participants produced
facial configurations denoting anger, disgust, fear, joy, and
sadness. EEG alpha power was analyzed during each facial pose,
with facial conditions grouped according to the approach/withdrawal
motivational model of emotion. This model suggests that
“approach” emotions are associated with relatively
greater left frontal brain activity whereas
“withdrawal” emotions are associated with relatively
greater right frontal brain activity. In the context of a bilateral
decrease in activation, facial poses of emotions in the withdrawal
condition resulted in relatively less left frontal activation
in the lateral-frontal, midfrontal and frontal-temporal-central
region, but not in the parietal region, as predicted. Findings
in the approach condition were less consistently supportive
of predictions of the approach/withdrawal model. Implications
for the approach/withdrawal model and for the emotion eliciting
potential of voluntary facial movement are discussed.