According to researchers, neuropsychiatric disorders such as bipolar disorder and schizophrenia could be a byproduct of evolution.
— Read on neurosciencenews.com/evolution-schizophrenia-bipolar-9679/

Hmmm, interesting, so except for the changes in the length of these sequences, the genome seems normal. But mutations in these non coding sequences are associated with bipolar disorder and schizophrenia!