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American adults owning a smartphone these days, researchers in switzerland have found that those who use devices have higher brain activity than those who use old style cell phones. let's talk about it with dr. nina radcliffe. if anyone has been around me more than two seconds they know i'm a mad texter. i use my thumbs and others use fingers but i've never imagined in a world smartphone of technology this is actually helping my brain. how in the world is it helping my brain? >> itaking us smarter. every part of our body from head to toe has a corresponding or december designated area in the b...