Sometimes when I lie in bed, with my eyes closed, I get the sense that my head is actually at the bottom of the bed, where my feet usually are, when I know it is still resting on the pillow on the top pat of the bed. Sometimes, I get the sense that my head is turned towards one side of the room, when I know is turned to the other side of the room.
Basically, there is a disconnect between my conscious knowledge of my head's direction, and what my "senses" are telling me. If I open my eyes, I am never laying in the direction my senses told me. Sometimes, I can induce this effect, by just visualizing myself laying in a different direction than the one I know I'm laying in.
What could be the cause of this effect? Is it a malfunction of proprioception, a corruption of memory, a near-sleep phenomenon, a malfunction of magnetoception (although that hasn't been proven to be human sense last I checked), or something else? Is this even a phenomenon that anybody knows about?
EDIT: I asked this questions on three different subreddits, and a lot of people had some very interesting speculations on the subject.
