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can affect how you think.
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But what's new is
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we can now in different ways
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see the direct effects of mental life.
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Somebody with a severe and profound loss of mental faculties--
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the deficit will be shown correspondingly in her brain.
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Studies using imaging techniques
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like CAT scans,
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PET,
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and fMRI,
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illustrate that different parts of the brain are active
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during different parts of mental life.