The brain sends electrical impulses to the muscles and without these signals the body is unable to function and "dies" , the death is followed by the breaking down of the elements of the body which (if we still buried people) would be absorbed back into the soil as nutrients and minerals.
The control of those electrical impulses isn't always under our control (reflex actions) but most of the time we are aware of our movements and actions.
The question is :
Do you view people as higher beings with a "soul" or as a highly developed biological machine?
I think the latter and I believe that when the plug is pulled the power is absorbed back into the network (Universe) so to speak.
I do not believe that the energy that makes us function is in any way sentient, any more than the energy that makes your TV work is.