You shouldn't consider any functions of your current brain state as external when discussing locus of control

Epilepsy - and there's a very gradual slope of brain deficits which start seeming more "conscious" in nature from that point on And there's a similar slipper slope with non-brain body parts, over which we have varying degrees of conscious control.

Since this is mostly about framing, I'd recommend attempting to do away with free will intuitions entirely and intentionally failing to draw a clear boundary between self and non-self. Is it possible to simply perceive and act, without externalizing or internalizing?