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Psychological and neuroimaging studies have revealed a close relation between adaptive behaviors and psychiatric disorders as well as functional responses to exposed emotional events. Nevertheless, relation between a trait of harm avoidance and neural reactions to ‘uncertain’ events is not well studied. Here, we used functional magnetic resonance imaging (fMRI) to examine whether the trait of harm avoidance, as measured by Temperament and Character Inventory (TCI), relates to functional activations in anticipation of ‘uncertain’ emotional events compared to when upcoming emotional event was ‘certain.’ Healthy young adult participants (N=17) were exposed to emotional, valence-inducing images preceded by ‘certain’ or ‘uncertain’ auditory cues. Compared with emotional ‘certain’ conditions, harm avoidance score was positively correlated with brain activation in the bilateral insula and the mid-cingulate cortex while no correlations were found for decreased activation. Individuals with high harm avoidance showed excessive activations in these regions. Our results may provide an additional evidence for the possible relations among adaptive behavior, excessive neural responses to uncertain events (taken as negative), and vulnerability to depression and/or anxiety.

The Relationship between Brain Activation When Anticipating Emotional Stimulus in Uncertain Situations and Harm Avoidance: An fMRI Study