87

models of emotion. For example, autonomic arousal (SCR and

HR) may be mediated by the right hemisphere and hence RHD

patients would show diminished responding during both shock

and reward tasks. At the same time, facial activity, a more

accurate index of valence, may provide support for the

valence hypothesis such that RHD patients show reduced

corrugator muscle activity during negative emotions, but

accentuated zygomatic activity during positive emotion,

whereas LHD patients would show the reverse pattern. The

above is only one example of support for both the bivalent

and global models. There are other possible outcomes

indicating support for both models.