It is interesting that a person goes bald with male pattern baldness in a pattern that is exactly over the galea area of scalp.
Another interesting fact is that no grows hair on the forehead.
There are two muscle groups situated on opposite sides of the galea, the frontalis muscles in the forehead, which pull the galea forwards when the eyebrows are raised, are also flexed with with various other facial expressions.
The occipital muscles are in back of the head behind the ears and they pull the scalp backwards. The occipitals don't get much exercise and they continue to get weaker and atrophied with age.
My theory/hypothesis is that as the occipital muscles continue to get weaker, the frontalis muscles of the forehead remain strong and too tight and this creates an imbalance condition causing the scalp to become thin and shiny... as DHT becomes backed up due to inadequate lymphatic drainage.
Hair does not grow on the forehead possibly due to enzymes in that region that inhibit hair growth. These enzymes can migrate into the galea region, due to weakened lymphatic vessels - causing temporal recession and hair thinning. Sometimes these enzymes can even affect the eyebrows, causing eyebrow balding too. Usually DHT causes massive HAIR GROWTH but the opposite seems to occur in the scalp. Scalp hair eventually becomes allergic? to DHT causing even more miniaturization. Transplanting such an allergic follicle to the forearm would not halt its balding progression but it would regrow if the immune system becomes weakened like in the immune deficient mouse hair regrowth experiments.
When the occipital muscles in the back of the head become too weak it is similar to when the abdominal muscles become weaker and people begin to have pot-guts and bad backs due to the tight back muscles and weak abdominals.
By strengthening the occipital muscles in the back of the head, it becomes possible to restore the galea and other scalp tissues to a more youthful condition, allowing for hair REGROWTH.
Mr. Hagerty's scalp exercise instructions advises people to get the maximum movement of their galea by alternatively flexing the occipital muscles and then the frontalis forehead muscles. Flexing the frontalis forehead muscles is not necessary since they are already tight from constant flexing throughout a lifetime.
Some people do report increased balding from doing the scalp exercise in such a way. It seems that the galea would be pulled tightly over the skull during the entire workout, like a blanket pulled tightly over a globe. The result could be increased thinning and accelerated balding if not a stall in progress.
By concentrating the focus mainly on the occipital muscles, the tightened forehead muscles become more relaxed and stretched, thus allowing for restoration of the scalp tissues from years of atrophy.
People with advanced balding have very thin scalp skin over the galea area of scalp
