No, I think this is meaningless. What you're refering to is the brain. Positing a subcoscious mind adds nothing to the explanatory model since everything this supposed entity does is already done by the brain and pretty well understood at that. Occam's razor. You're stuck in old Cartesian metaphysics (dualism and parallelism) which has been superceded by better scientific undetstandings for quite a while now.
Dualism is proposing that there is a clear division between mind and body, which is your original claim that I'm debating.
You're making a division between mind and body, stating that stress can occur without the mind.