For reasons that lie deep in the evolutionary history of the vertebrates, the right hemisphere deals with sensory input from the left-hand side of the body, and vice versa.

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Dr. Waltz decided to put an implant in just the right side of my chest -- the right brain controls the left side of the body.

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Those have instead been moved to the left-hand side of the handset, towards the bottom of the body, below the hidden tray for the micro-SIM and microSD cards.

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