title: EEG frequency and cognitive dysfunction in patients with Parkinson's disease.
abstract: BACKGROUND
  Numerous studies showed EEG changes in patients with Parkinson's disease, in comparison with healthy subjects of same age. The most often presented change is generalised (or localised) slowing of frequency.
  
  
  OBJECTIVE
  To show the correlation of EEG frequency and Mini Mental Status (MMS) in patients with Parkinson's disease.
  
  
  METHODS
  32 patients with Parkinsons disease were analysed. An average age was 64.63 +/- 10.01 years, and most of them were men (24 or 75%). On the basis of MMS score, two groups were selected: with and without signs of dementia. For both groups, EEG frequency values were determined.
  
  
  RESULTS
  There were 11 patients without dementia (MMS score = 23-30) with average age of 64.63 +/- 9.54 years; and with dementia (MMS score < 24) 21 patients (average age was 62.71 +/- 10.04 years). In patients without dementia, diffuse slowing down of frequency was found in one patient (9.1%); localised in three (90.9%). In dementia patients, four patients (19.04%) had diffuse slowing of EEG and seven (80.96%) had localised. A positive correlation of EEG frequency and MMS score was found (r = 0.46), and Parkinson's disease patients with dementia had more frequently EEG with slowing frequency than non-dementia patients.
  
  
  CONCLUSIONS
  EEG slowing frequency is more frequent in Parkinson's disease patients with than without dementia.
authors.affiliation: Department of Neurology, University Clinical Center, School of Medicine, University of Tuzla.
authors.forename: Osman
authors.initials: O
authors.lastname: Sinanović
authors.forename: Almasa
authors.initials: A
authors.lastname: Kapidzić
authors.forename: Larisa
authors.initials: L
authors.lastname: Kovacević
authors.forename: Josip
authors.initials: J
authors.lastname: Hudić
authors.forename: Dzevdet
authors.initials: D
authors.lastname: Smajlović
mesh_terms: D003704:Dementia / Q000150:complications / Q000503:physiopathology*; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D008609:Mental Status Schedule; D008875:Middle Aged; D010300:Parkinson Disease / Q000150:complications / Q000503:physiopathology*