I'm currently re-reading Dr. Oliver Sacks's famous book "The Man Who Mistook His Wife for a Hat."  Chapter 3, "The Disembodied Lady," tells the fascinating tale of a woman who lost her ability to sense her own body.  Christina went overnight from a state of vigorous health and youthful activity to one in which she could not function at all.  Without her 6th sense (her proprioception as Charles Sherrington named it in the 1890s), Christina could not even [...]