Concussions are not generally caused by directly applied force, but are rather thought to be due to the consequences of a rotational force as the head and brain move around a fixed point at the neck. Since helmets do not prevent the head from moving around the neck, they cannot prevent these rotational forces from being applied to the brain.
We have long known that sun exposure is especially dangerous for women like me, who have the genetic trifecta of red hair, blue eyes and fair skin from an Irish/Scottish genetic background. Redheads also make up 16 percent of the world’s melanoma patients. In fact, Redheads have a 102 percent higher risk of skin cancer than brunettes.