For twenty-five years, I was a Recreational Therapist, mostly in Nursing Homes, and I specialized in helping folks with dementia make it through their often terrifying days- it is difficult to imagine what it is like for them because our own minds shear off from considering it.
But, yes, a car ride can bring someone with a dementing condition 'back' for awhile, as can babies and children, normal tasks like bed-making or cooking chores, and, especially, music.
It doesn't last, of course, but to give someone the gift of normalcy for even a few minutes is itself a gift to the giver.
I think these three ladies are likely not living inside dementia, but are old enough to have to be careful- skin-tears and bruising and broken hips, iffy digestion and iffy-er waste management control- it narrows the world of possibility somewhat- to the point they no longer feel like players in the game, but simple audience members in the dark, not even noticed by the players on the stage.
A sled ride- with cushioning! allowed them to be a player again, too.