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Average power spectra over 90 AAL regions for Parkinson's disease patients with only VH (unimodal Hall+: red), with multimodal (multimodal Hall+: green) and without (Hall-: blue) hallucinations. Peak frequency (i.e. frequency with the most power in the 4–13 Hz range) is lowest in unimodal Hall+ patients. Filled area represents the standard error of the mean.
VH: Visual Hallucinations.
