The Pitt team didn't think the primary motor cortex would control the adrenal medulla at all. But there are a whole lot of neurons there that do. And when you look at where those neurons are located, most are in the axial muscle part of that cortex.
“Something about axial control has an impact on stress responses,” Strick reasons.
Why One Neuroscientist Started Blasting His Core
An anatomical understanding of how movement controls the body’s stress response system
