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Sixty-two patients with idiopathic Parkinson disease and 30 patients of a control group were clinically evaluated in the light of cognitive and/or psychic impairments according to DSM III-R, mini-mental state examination and Hamilton rating scale for depression. These patients were also submitted to electroencephalogram registration (EEG) with photic stimulation. From the parkinsonian group, 45.2% did not have mental manifestations as classified in the DSM III-R. Other 24.2% had depression, 14.5% had anxiety, 12.9% had dysthymic disorder and 3.2% had dementia. Considering the EEG, 58.1% of the parkinsonian patients had theta waves bilaterally, with predominance in frontal temporal or temporal areas, though more frequent on the left hemisphere than on the right one. Only 16.7% of the patients from the control group had these same findings in the EEG but neither of the two groups had their EEG modified by photic stimulation. The EEG findings were statistically significant when both groups were compared. However, these findings were not significant comparing parkinsonian patients with psychic impairment with the ones who did not have such impairments.

Distúrbios cognitivos na doença de Parkinson: correlações eletrencefalográficas