[Frontal lobe involvement and cortical and subcortical deterioration in Parkinson's disease evaluated using quantified electroencephalography].

Quantified electroencephalography (EEGq) by means the Fast Fourier Transformed system (FFT) was carried out on two groups of patients with idiopathic Parkinson's Disease (PD). The first one was with symptoms of cortical deterioration, and the second group consisting of subjects without signs of cortical impairment. The study of the specific EEGq indices has led to the establishment of parameters which establish differences between these two groups. Specifically, a difference has been found with regard to the total potentials of delta and alpha frequency bands; alpha/theta index; posterior activities; changes in the lobular antero-posterior of delta and alpha rhythms; and in the distribution of the spatialization index of alpha rhythm. We discuss the implications of this electrophysiological differentiation between the two groups, regarding the possible frontal lobe affection in the subcortical dementiation of the Parkinson's disease.