Estudo da coerência do eletrencefalograma para a banda de frequência alfa em indivíduos adultos normais e com provável demência do tipo Alzheimer

We studied the occiptal inter-hemispheric coherence (IHCoh) of EEG (electrodes O1-O2) for alpha band (alpha1 - 8,0 to 10,0 Hz and alpha2 - 10,1 to 12,5 Hz) in healthy adults and Alzheimer's type dementia (ATD) subjects, to observe if there is any significant difference between these two groups that could help in the early diagnosis of ATD. We found a decrease of occipital IHCoh in ATD group for both alpha sub-bands. We believe that Coh analysis of EEG is a powerful auxiliary method in ATD diagnosis.

[1]  D O Walter,et al.  Regional differences in brain electrical activity in dementia: use of spectral power and spectral ratio measures. , 1993, Electroencephalography and clinical neurophysiology.

[2]  Mitsuru Kikuchi,et al.  Abnormal functional connectivity in Alzheimer’s disease: intrahemispheric EEG coherence during rest and photic stimulation , 1998, European Archives of Psychiatry and Clinical Neuroscience.

[3]  F H Duffy,et al.  Brain electrical activity in patients with presenile and senile dementia of the Alzheimer type , 1984, Annals of neurology.

[4]  D Liberati,et al.  EEG coherence in Alzheimer's disease. , 1998, Electroencephalography and clinical neurophysiology.

[5]  T. Kircher,et al.  Cognitive decline unlike normal aging is associated with alterations of EEG temporo-spatial characteristics , 1998, European Archives of Psychiatry and Clinical Neuroscience.

[6]  A. Leuchter,et al.  Relationships between EEG Coherence and Neuropsychological Tests in Dementia , 1995, Clinical EEG.

[7]  N Yamaguchi,et al.  Reduced Interhemispheric EEG Coherence in Alzheimer Disease: Analysis During Rest and Photic Stimulation , 1998, Alzheimer disease and associated disorders.

[8]  K. Herholz,et al.  Quantitative EEG mapping and PET in Alzheimer's disease , 1992, Journal of the Neurological Sciences.

[9]  G. Comi,et al.  IFCN standards for digital recording of clinical EEG. International Federation of Clinical Neurophysiology. , 1998, Electroencephalography and clinical neurophysiology.

[10]  T. Gasser,et al.  EEG coherence in Alzheimer disease. , 1994, Electroencephalography and clinical neurophysiology.

[11]  D. Lehmann.  Multichannel topography of human alpha EEG fields. , 1971, Electroencephalography and clinical neurophysiology.

[12]  P. Bertolucci,et al.  [The Mini-Mental State Examination in a general population: impact of educational status]. , 1994, Arquivos de neuro-psiquiatria.

[13]  D. O. Walter,et al.  Electroencephalographic spectra and coherence in the diagnosis of Alzheimer's-type and multi-infarct dementia. A pilot study. , 1987, Archives of general psychiatry.

[14]  E P Sloan,et al.  Neurophysiology and SPECT cerebral blood flow patterns in dementia. , 1994, Electroencephalography and clinical neurophysiology.

[15]  Ian A. Cook,et al.  Reduced EEG coherence in dementia: State or trait marker? , 1994, Biological Psychiatry.

[16]  T. Fernández,et al.  EEG coherences in patients with brain lesions. , 1994, The International journal of neuroscience.

[17]  Sonia Maria Dozzi Brucki,et al.  O Mini-Exame do Estado Mental em uma população geral: impacto da escolaridade , 1994 .

[18]  F H Duffy,et al.  Age‐related differences in brain electrical activity of healthy subjects , 1984, Annals of neurology.

[19]  Renato Anghinah,et al.  Recomendaçöes para o registro/interpretaçäo do mapeamento topográfico do eletrencefalograma e potenciais evocados: parte II: correlaçöes clínicas , 1999 .