A sense that allows perception of the body's position in space and movement, which can be impaired by neurological conditions like Guillain-Barré Syndrome.
"For example, she learned about propreoception—a sense that lets you perceive your body's position in space and movement—because her proproception was messed up. So when my mom would be laying down on her back, close her eyes, and think that she was upside down, falling, flying, etc."