So the forces that pull the spine towards the chin and the chin towards the spine are connected and may also be connected to the enlargement of the top of the skull. Wow. Not really earth shattering.
I wouldn’t be surprised if they find out the skull shape shifting process has nothing to do with anything they think it does. I remember an experiment the russians did on foxes. They bred them to be more docile in cages to help the fur industry. All of a sudden they started getting dog like secondary characteristics...white spots in their coats, odd colors, floppy ears, barking...all because they bred for a subdued fight/flight response to stress.
The movements of human skull development that pinches spine to chin together could be something as simple as a response to dietary changes, or lack of sun exposure due to indoor living. Or something completely unexpected like a result of not going barefoot.
With the shoulder bone connected
to the back bone,
and the back bone connected
to the neck bone,
and the neck bone connected
to the head bone.
Oh mercy how they scare!
Oh those bones, oh those bones,
oh those skeleton bones.
Oh those bones, oh those bones,
oh those skeleton bones.
Oh those bones, oh those bones,
oh those skeleton bones.
Oh mercy how they scare!
Long narrow skulls or broad full skulls can be influence by the amount of Vitamin D in the diet. My mother had a narrow jaw and very crowded crooked teeth. I had a similar situation. When my oldest son’s face started to narrow at age 1, I had just read Adelle Davis’ book “Let’s Have Healthy Children” where she explained the influence of Vitamin D on bone growth. I started giving my son cod liver oil in the recommended amount, and his face began to grow broader again. He never needed orthodontic work, and he has never had a cavity at age 41. He did have to have his 6 wisdom teeth pulled. Six you say!! They wanted to know if he had any Esquimo blood. I said his father was 1/16 Cree Indian, so perhaps that is where this came from as they are Canadian indians.
Gene linkage - same thing with domesticated foxes. The same genes which produced tamed foxes produced animals with coats and tails similar to domestic dogs, not wild foxes.