That sz has a common component in the dysfunction of the right anterior insula is no surprise to those who are familiar with brain mapping. What intrigues the hell out of me is that Asian sz pts tend to hallucinate visually while Caucasians tend to hallucinate aurally. Because that may suggest cultural conditioning layered on top of genetic physiology.
I say that because other studies I have read demonstrate that while Asians tended to be far more oriented to conscious awareness of their perception and less verbal-thought-oriented before Western culture invaded their homelands in the second half of the 20th century, Caucasians have tended to be far more “in their minds” and verbal-thought-oriented for most of the 20th century.
Are you following me here? If you are, you may see why it is that sz pts in the West tend to hallucinate verbally as opposed to (or more than) visually: We think too ■■■■■■■ much.
Because we were taught to do so that we would follow instructions? Freud thought so a century ago and explained it in several books, including Civilization and its Discontents. Contemporaries like Veblen, Durkheim and Cooley also wrote about it in the late 1800s and early 1900s.