Anterior area is responsible for vasodilation. Posteria for vasoconstriction. Yin and Yang? Some texts on traditional chinese medicine describe a syndrome which is pretty similar to me/cfs. Deficient yin (and variants of it). Yin cools you down. Restrains yang which is hot. To much heat causes injury. Cold water therapy might be the solution here.I'm only up to the Anterior Hypothalamus at the moment.