Not without any one of the following:
Turning into an animal with your own brain structure (possibly miniaturised in some scientifically impossible way. Hmm. Scratch this one for much smaller forms.
Extruding your brain into an adjacent dimension in some form of life support and the equipment to remotely control your new body.
Proving mind/body duality.
Raises an interesting point, actually. By the normal definitions by which we define ourselves, the butterfly that emerges from a cocoon (or any other insect that undergoes complete metamorphosis this way) is not the same one that wove it. It completely disintegrates then essentially undergoes a second embryonic development. We it to happen in humans, we would completely lose our larval identity. Basically, death and a new birth.
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