People can start acting with seemingly-conscious intent before they consciously become aware of the action. This delay can be quite a few seconds. Under ideal conditions with brain imaging, it's possible to guess some time what a person will do before they announce their own awareness of their intent (e.g. press one of two buttons).
I've had hints of this experience subjectively, from time to time. Action, then thought, in that order. I'd like a sip of water; with particularly careful awareness of relative sequencing, I'm fairly sure that, sometimes, when this thought percolates to the surface of my mind, my hand is already moving towards the glass.
Sometimes I wonder if the conscious self is mostly just a passive observer, constantly coming up with post-hoc rationalizations to explain why the body just acted the way it did. Decidedly unnerving, but that seems to be the nature of our being.
Multiple loci of consciousness is, IMO, fairly strongly supported by what happens with brain damage. Very rarely, people with damage to the corpus callosum linking the hemispheres of the brain, develop something like alien hand syndrome, where half of their body adopts complex and seemingly-intentional behaviour, that the person is quite unaware of consciously. This manifestation is sometimes described as having a personality and desires, which are often similar, but not identical, to the conscious part of that person.