chimeric faces. Notable lateralized brain structures and regions Emotion is processed in many different areas of the brain, and a specific emotion may be processed in multiple areas. Regions involved in emotional lateralization appear to follow the general conventions that describe the roles/functions of certain brain regions. Below are a few regions and structure involved in emotional processing that show functional lateralization. Frontal lobe Using a PET scan, researchers found that activity in the left medial and lateral prefrontal cortex was reciprocally associated with decrease activity in the amygdala. These findings imply that the prefrontal cortex modulates the amygdala activity. The left prefrontal cortex plays a role in approach behaviors (positively valenced emotions), while the amygdala plays a role in withdrawal behaviors (negatively valenced emotions). The superior frontal gyrus is the most significantly activated region while processing sadness. Patients with inferior frontal lobe damage produce less and less intense facial expression when presented with emotional stimuli, and they also have problems reading fear and disgust in other people. People with left inferior frontal lobe damage produced less facial expression and could not analyze emotional situations as well as those with right frontal lobe damage especially with fear and disgust. The left inferior frontal gyrus (IFG) plays an important role in anger while the right IFG plays a larger role in disgust. Patients with dorsolateral frontal cortex lesions have difficulty discerning propositional attitude. Patients with left lesions show further increased impairment. Parietal lobe Damage to the inferior parietal region including the anterior (supramarginal gyrus) and posterior (angular gyrus) regions resulted in reduced SCR. Damage to the right hemisphere in these regions resulted in a significant (p < 0.001) decrease in SCR while the damage to the left hemisphere of these regions did not (p > 0.05). Temporal lobe The right superior temporal gyrus was the most significantly activated area during the processing happiness. The right superior temporal gyrus increasingly responds to an increasingly happy stimuli, while the left pulvinar increasingly responds to increasingly fearful stimuli. The right pulvinar is activated during aversive conditioning. Amygdala The amygdala plays a key role in emotional processing especially fear, and amygdala function appears to be emotionally lateralized. When people are shown fearful faces the left amygdala and left periamygdaloid cortex increase in activation. There also appears to be a greater increase in neural activity in the left amygdala corresponding to an increasingly fearful stimulus. Recordings