If I understand it correctly, she says that when sensory input ceases, the mind creates the "external self" and one are able to view ones own body from an elevated position, and this is due to an hallucination of this absence of input to the senses. Olaf Blankes test of this phenomenon always created an image that was seen slightly from behind, IIRC, and never from above, hovering, as in NDE's.
This created image takes form as of how one perceives ones own body to look like, But in several of reported NDE-cases the person having the NDE-OBE often wonder first who it is lying there beneath them - and when they realise who it is they often get a bit suprised of how they look like from "the outside" - either they say;
"OMG, I didn't think I looked that fat" or
"I didn't think I looked that old" etc
They failed to have created a image of the self that ones mind perceived how it would look. An image that your mind would be "comfortable" with. This is instead a "new", and surprising, image that they at first doesn't recognize. I think that that flies in the face of her theory of the perceived self.
Also, she says when one tries a
sensory isolation experiment one should be able to create this sensation. I have tried that in one of those
float tanks and had sound, vision, and smell suppressed as much it was possible, and I was free-floating in salt water that had the exact temperature of my body. One gets the sensation of floating free in an empty space, but I never got the sensation of seeing myself from an external point of view.
PS: Did you have her paper where she explained her theory of the tunnel in NDE's??