Who is Christina from The Man Who Mistook His Wife for a Hat and Other Clinical Tales and what is their importance?

Christina is a working mother in her late twenties when she goes in for routine gallbladder surgery and ends up losing all sense of her own body. Christina is no longer able to make her body work properly and she feels "disembodied" or "pithed." However, Christina is strong and a fighter. She works hard to learn to visualize her body moving and working as it should. Utilizing this technique she is able to return home and work out of her house. Her efforts are exhausting and she will never lead a completely normal life again, but she is at least able to be home and to care for her children.