I see personhood as systemic.
It extends beyond the body confines into the physical and social sphere as well.
Can a person exist without a communication system that connects the various parts? Is there a minimum and a maximum person?
Hypothetically one might consider a minimum person to be a highly conserved nervous system within the brain itself along with whatever life support system keeps that brain alive.
Extend the nerves from the brain to further extremes and those extremes become incorporated into the person as well.
Does a TV show that I am watching become a part of my person? It does.
Is the image you project of yourself here in this forum with your words become a part of my person as I consider and write my responses? It does.
onversely, it is possible to have an attached part of the body feel as if it is NOT person of one’s person.
“Alien hand syndrome” is a common neurological issue whereby one does not believe the hand is theirs.
As it is controlled by a part of the brain that is not properly communicating with the part that considers what “the self is”, it is indeed alien to the owner of it.