Authors:

BEAVER, J.D., Lawrence, A.D, PASSAMONTI, L., and CALDER, A.J.

Reference:

Year of publication:

2008

CBU number:

6680

Abstract:

The ‘Behavioural Approach System’ (BAS) (Gray, 1990) has been primarily associated with reward processing and positive affect. However, additional research has demonstrated that the BAS plays a role in aggressive behaviour, heightened experience of anger, and increased attention to facial signals of aggression. Using fMRI, we show that variation in the BAS trait in healthy participants predicts activation in neural regions implicated in aggression when participants view facial signals of aggression in others. Increased BAS-drive (appetitive motivation) was associated with increased amygdala activation and decreased ventral anterior cingulate and ventral striatal activation to facial signals of aggression, relative to sad and neutral expressions. In contrast, increased Behavioural Inhibition (BIS) was associated with increased activation in the dorsal anterior cingulate, a region involved in the perception of fear and threat. Our results provide the first demonstration that appetitive motivation constitutes a significant factor governing the function of neural regions implicated in aggression, and have implications for understanding clinical disorders of aggression.

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