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ALTERED STATES. These positron-emission tomography images show brain areas with unusual metabolic activity in a Parkinson's disease patient. Side view (left) shows that regions that coordinate physical movement are red, indicating overactivity when compared with normal metabolism. Brain regions associated with movement execution and skill learning are blue, indicating less activity than normal. Cross section (right) shows that the thalamus is another area associated with physical coordination that's overactive in the Parkinson's patient. Credit: Eidelberg
Found in: Biomedicine

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