Here’s an analogy regarding the follicle and the papilla.
Consider a motor in a car and the gas tank. If you take away the gas tank the motor will stop, but is the motor really dead for all time?
This was the example a hair transplant surgeon used in his explanation of transplant surgery for me. (He also said I’m an IDIOT a few times, so I hope you all know that I have worn the dunce cap MANY times myself!)
The thing is, I ASK questions all the time and bug the hell out of every doctor I’ve ever known. I just want to LEARN! Oh, and they don’t know everything either! So, NO “rock stars” anywhere … as far as I’m concerned.
Using your own understanding of blood and blood vessels, what would you expect to happen if a blood vessel were physically removed from the skin? Wouldn’t the blood quickly coagulate and render the vessel non-viable? (Blood coagulates out of the body in seconds!)
Now consider this. In hair transplant surgery, individual follicles are cut out of the skin. The papilla is probably rendered “kaput.” Amazingly, hair grafts can even be put in a refrigerator (at about 38 Fahrenheit), kept overnight and then implanted in the donor slits, and they survive! (Dr. Kurgis does this with very big cases and when the “team” and patient get tired. Hair transplant surgery is brutal!)
Would you expect that tiny blood vessel “papilla” to survive over night? Probably not. If “something” survives, just what is it that does survive? Actually the STEM CELLS in the follicle survive.
Back to our “car motor” analogy … the follicle is the motor and simply waiting for more gas. Once placed back in a friendly environment … with lots of blood and blood vessels … the follicle (stem cells) springs back to life.
Again, it’s the motor in the car that’s the real “brain” not the “gas tank.” “Dr. K” believes the follicle simply “grabs another papilla” and starts all over again. This is very understandable because the “papilla” is NOT a unique structure associated only with a follicle. Indeed the entire underside of the epidermis has countless (millions and millions of) papillae that “feed” the skin. That’s why the upper dermis is called the “papillary layer.” Papillae are “all over the place.” Billions?
Furthermore, hair graft surgeons are able to split the hair graft in two parts (upper and lower) and there are enough viable stem cells in the follicle so that, in most cases, BOTH halves will grow a new hair. Without doubt, that “upper follicle” has no papilla.
The idea that a papilla GROWS a hair ALONE is nonsense. That is like saying that a GAS TANK can grow a car’s motor. The genius of the hair are the stem cells. We have much to learn about this.