Why is Hair on the Back and Sides of the Head More Resilient Than the Top?

Just wondering what is responsible for the pattern of “male patterned baldness” ?

Why does the hair at the back and sides of the head seem to be more resilient than the hair at the top ?

Thanks Doc.

It is called genetic male pattern baldness. Keyword is “genetic”. Genes are responsible for it, but as to the reason it works out that way, I haven’t a clue. I posted a theory about it before — Why Does the Back and Sides of the Head Not Lose Hair?