She said after the initial transplant operation, a further CT scan returned abnormal results and so another operation was carried out.

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More common side effects include dry skin, dry eyes and abnormal results of lab tests such as those of liver function.

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Many physicians take issue with the scope of a test like Biophysical's, maintaining that even healthy people will show some abnormal results in such a broad survey.

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Professor Michael Kopelman, a neuropsychiatrist, told the Old Bailey that brain scans of Mr George had produced "severely abnormal" results.

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Officials from the Chinese Olympic Committee have confirmed to the state-run news agency Xinhua that all of the Chinese athletes in the games are currently "clean" and that so far there has been no notice from the IOC about athlete doping test results that are positive or abnormal.

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The study results could help distinguish between normal and abnormal processes within the visual cortex and identify what parts of the brain are targets for the treatment of anxiety disorders.

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"This is huge because the results illustrate that what we call normal in this country is abnormal, " Van Horn says.

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