I think this is a preety mysterious and good question...
How the soul, the mind and the body are All connected?
Some may argue that soul does not exist etc, but let's stay to the ones that do believe in soul's existence.
I had this question for long time, one I saw on yahoo a question saying "If our soul controls our body, why with a brain accident we're not able to move and such?" Preety good question too...
I would love to hear other's opinions here! Here's mine:
I believe our soul is us; and us is our consiousness. From the time of enterance the soul into the body, the soul is limited by the body, this consiousness gets a physical form, that's why I believe it is limited. This consiousness/soul will only liberate and stop being limited by physical body only when the physical body dies.
That's why when you get a brain damage or disturbing in our health we get limited by it.
And about the brain, physically brain controls the whole body. So...