Truthfully I am not well read. I have had to memorize in an audible fashion and other tricks to circumvent the effects of dyslexia and migraine since birth. At 58 the migraines vanished. Woo HOO
Scientists suggest left angular gyrus irregularities but with such strong effects on the eyes I believe migraines have an occipital connection with hormone disruption.

Some of us have noticed that Donald Trump has damaged emotions. It is a complex issue that I would think first requires knowing where that damage effects a person in their brain.

1. Happiness activates several areas of the brain, including the right frontal cortex, the precuneus, the left amygdala, and the left insula. This activity involves connections between awareness (frontal cortex and insula) and the “feeling center” (amygdala) of the brain.

2. Fear activates the bilateral amygdala, the hypothalamus and areas of the left frontal cortex. This involves some thinking (frontal cortex), a “gut” feeling (amygdala), and a sense of urgency typically associated with survival (the hypothalamus.)

3. Sadness is associated with increased activity of the right occipital lobe, the left insula, the left thalamus the amygdala and the hippocampus. The hippocampus is strongly linked with memory, and it makes sense that awareness of certain memories is associated with feeling sad.

Sadness has been studied more than the other emotions because depression may last for a long time; the effects of antidepressants can be measured based on improved symptoms.

4. Disgust is an interesting feeling that is often associated with avoidance. This emotion that is associated with activation and connections between the left amygdala, the left inferior frontal cortex, and the insular cortex.

5. Anger is an important emotion that many people, adults and children alike, try to control. Anger is associated with activation of the right hippocampus, the amygdala, both sides of the prefrontal cortex and the insular cortex.

6. Surprise is an emotion that can either make you feel good or it can make you feel bad. Surprise activates the bilateral inferior frontal gyrus and the bilateral hippocampus. The hippocampus is strongly associated with memory, and the element of surprise is, by nature, associated with experiencing something that you do not remember or do not expect.

Localized disease in the brain can cause cross over cascading events to other areas of emotion.

definitions and location of emotions is from Neurologic review
https://www.neurologylive.com/view/how-brain-processes-emotions