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Just tried it. I'm able to move the focus of my attention downward. Mostly the same way as I can consciously widen the angle of my attention.
But I can't be sure that this implies that it is my self. I'd like to add that there are multiple self: A perceiving self (which I'm tempted to locate in the brain), a whole self which contains everything of my body that I take to be my body and then probably another self which is the space that I contain and where I do not wan't anybody to intrude on. And some more.
ADDED: The widening of the angle of perception seems to be this: http://en.wikipedia.org/wiki/Deconcentration_of_attention
I just tried imagining being in my heart looking up at my head. I can't guarantee that I actually moved my sense of self-- maybe "I" was still in my head creating an imagined self in my heart-- but it was at least an interesting and rather cheering experience. I feel more alert.