I am recalling my own sleepwalking experience. As a kid with severe allergies, I would get out of bed, go downstairs, grab a tissue sometimes a towel tissue, and then go back to bed. I would have no recollection of it when I woke up.

Was this muscle memory doing its thing? Or was this instincts? Or was it something embedded in the mind? I am not sure.

What your comment does bring up the possibility of is that maybe the pons are not damaged. But rather the other brain functions out power the pons of the brain. Otherwise, you would always be sleepwalking. Maybe the pons are there to absorb body movements that come from thought.

Very exciting questions indeed.