What is Considered the Frontal Hair (Since Meds Don’t Work Well There)?

I hear a lot about how Finasteride and Minoxidil do not work well in reversing frontal hair loss, how far back is the hair considered frontal hair. To rephrase the question, by what Norwood are you considered to have no frontal hair? Also, even if Finasteride wont reverse frontal hair loss, will it at least help me keep the hair in my hairline and at best help thicken it up?

The area that balds in the Norwood Class 4A is the frontal area (see art at right). Finasteride might slow the loss down in the front, but rarely reverses the hair loss in that pattern. Minoxidil might regrow hair in that area, but it would be extremely rare.