We have no good understanding of how things like “gender identity” and “sexual orientation” are implemented on a neurological level. But thats where they are implemented— we don’t have male or female souls imo. There may be a lot of parallel circuitry for maleness/femaleness so perhaps a neurological abnormality would be subtle and difficult to observe from an MRI (one small structural defect could engage the wrong circuitry)

What seems salient to me with trans and gay people is that many seem to have other behavioral anomalies. I have run across some trans people that are very erratic and prone to violence and suicide. Alot of LGBT folks are heavy drug users. I could go on but you have probably noticed these things yourself.

I dont think gays and trans have the brain of the opposite sex in their skull. But I do think some of them might have an abnormality in the typical dimorphism one sees in male and female brains. This might be due to hormonal dysfunction in utero, or some sort of maternal immune reaction as some suggest.

Or it might be one symptom of a larger neurological condition.

I really believe we will discover multiple underlying neurological causes of lgbt behaviors. As well as a few that just had sub-optimal cultural experiences.

I was actually reading some study the other day that said the sexual dimorphism in brains was not even the same from race to race. E.g some groups have larger differences in the size and structure of the corpus collosum.