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Consistent with the previously identified attitudinal divergence, conservatives have more intense physical reactions to threatening stimuli than liberals [5]. Conversely, liberals had stronger physiological responses to situations of cognitive conflict than conservatives [6].

In the context of risk-taking decision-making, the amygdala is thought to be important for the processing of affective attributes involved in decision making [16]–[18]. The insular cortex is involved in the representation of internal bodily cues crucial for subjective feeling states and in signaling potential changes in interoceptive state to possible decision-related outcomes

In particular, a recent study of young adults suggests that liberals and conservatives have significantly different brain structure, with liberals showing increased gray matter volume in the anterior cingulate cortex, and conservatives showing increased gray matter volume in the amygdala.

Abraham wrote:"Consistent with the previously identified attitudinal divergence, conservatives have more intense physical reactions to threatening stimuli than liberals"

The above sounds like liberals are the very definition of: SHEEP!

The activity of the emotion centres in the brain – the amygdalae – is influenced by motivation rather than by the emotions themselves. This can be concluded from research carried out into the hormone testosterone. Testosterone increases amygdala activity in a person who is approaching a socially threatening situation and decreases the activity when such a situation is avoided. It was already known that the amygdala response to images of angry faces was stronger in a person who had received testosterone. This new study shows that this only happens when people approach angry faces and not when they avoid them.