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How are scientists using new techniques such as functional magnetic resonance imaging and electroencephalography? 

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In comparison with other functional brain imaging techniques (e. g., assessment of blood flow or functional magnetic resonance imaging), this method offers the advantage of a more naturalistic study of sleep since subjects do not have to sleep in a scanning device.
Such studies can be readily combined with high‐resolution anatomical imaging, task‐activation studies, and other magnetic resonance techniques.

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