Watched my own mum die racked with parkinsons --the last couple of years were heart breaking. She would never have been in a position in those last couple of years to make an informed decision. We were given a "choice"in Hospital at one point when an illness on top of the parkinsons meant she was given a feeding tube or basically left to die. We were persuaded by another nurse who said lots of people live decent lives with a peg tube. Well she did live a bit longer but wasn't any real quality of life. Our decision kept her "alive" for a couple more years ---in hindsight not sure it was the right decision.
We chose this verse from the Bible that seemed so fitting that she had left behind a body wracked with parkinsons for an inheritance incorruptible and undefiled
3 Blessed be the God and Father of our Lord Jesus Christ, which according to his abundant mercy hath begotten us again unto a lively hope by the resurrection of Jesus Christ from the dead,
4 To an inheritance incorruptible, and undefiled, and that fadeth not away, reserved in heaven for you,