Essentially, this is a subset of Epiphenomenalism
"The traditional doctrine of epiphenomenalism is that mental phenomena are caused by physical phenomena but do not themselves cause anything."
Thus body before mind.
Actually Descartes' arguments state the opposite...
"I am a thinking thing or a mind in my essence. In his philosophy mental processes come on first place."
Thus mind before body
Automaton Theory takes the middle road...
"Automaton-theory sees them as an independently existing world parallel to the world of physical events. These ideas make it easier to distinguish our bodily and mental actions by not mixing their nature at all. It is more convenient and avoids in a sense misunderstandings of our own behavior."
Thus mind & body are individual, neither is more important
http://www.geocities.com/boriana.geo...talevents.html
BTW, Automaton Theory is also a branch of study in mathematics, physics, economics and computers.
I would assume since this is Tilted Philosophy
you are talking about the Philosophical history & definition.
Personally, I think mind & body are BOTH unioned & separate.
One & Individual.