Alpha rhythm and hypofrontality in schizophrenia
Détails
ID Serval
serval:BIB_7071CB4D9B5E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Alpha rhythm and hypofrontality in schizophrenia
Périodique
Acta Psychiatrica Scandinavica
ISSN
1600-0447
Statut éditorial
Publié
Date de publication
2008
Peer-reviewed
Oui
Volume
118
Numéro
3
Pages
188-199
Langue
anglais
Résumé
OBJECTIVE: To reveal the EEG correlates of resting hypofrontality in schizophrenia (SZ). METHOD: We analyzed the whole-head EEG topography in 14 patients compared to 14 matched controls by applying a new parameterization of the multichannel EEG. We used a combination of power measures tuned for regional surface mapping with power measures that allow evaluation of global effects. RESULTS: The SZ-related EEG abnormalities include i) a global decrease in absolute EEG power robustly manifested in the alpha and beta frequency bands, and ii) a relative increase in the alpha power over the prefrontal brain regions against its reduction over the posterior regions. In the alpha band both effects are linked to the SZ symptoms measured with Positive and Negative Symptom Scales and to chronicity. CONCLUSION: As alpha activity is related to regional deactivation, our findings support the concept of hypofrontality in SZ and expose the alpha rhythm as a sensitive indicator of it.
Mots-clé
abnormalities , Adolescent , Adult , Alpha Rhythm , Brain , Brain Mapping , diagnosis , Dominance,Cerebral , drug therapy , Female , Humans , Male , methods , Middle Aged , Neurology , Patients , physiopathology , Prefrontal Cortex , Psychiatric Status Rating Scales , Reproducibility of Results , Rest , Schizophrenia , Schizophrenic Psychology , Sensitivity and Specificity , Signal Processing,Computer-Assisted , statistics & numerical data , Switzerland , Young Adult
Pubmed
Web of science
Création de la notice
29/01/2009 22:13
Dernière modification de la notice
20/08/2019 14:29