I arrived at age 5 based upon the location of the stored memories. It’s based upon observation of testing results, not just speculation.
My speculation or theory is that it is based upon the stage of psychological development child goes through at that age.
MS is an internalization of feminine consciousness. This is why more females get MS than males. I’ve noticed that the males that get MS tend to be softer or more feminine than most men. There is no judgement, just an observation.
You must be in the field of psychology or neuropsychology? In my job, I delve into people’s earliest memories. Fascinating stuff.