Cortical sources of resting state electroencephalographic rhythms probe brain function in naïve HIV individuals

Publication date: Available online 20 December 2017
Source:Clinical Neurophysiology
Author(s): Claudio Babiloni, Giuseppe Noce, Alfredo Pennica, Paolo Onorati, Paolo Capotosto, Claudio Del Percio, Paolo Roma, Valentina Correr, Elisa Piccinni, Ginevra Toma, Andrea Soricelli, Francesco Di Campli, Laura Gianserra, Lorenzo Ciullini, Antonio Aceti, Elisabetta Teti, Loredana Sarmati, Gloria Crocetti, Raffaele Ferri, Valentina Catania, Maria Teresa Pascarelli, Massimo Andreoni, Stefano Ferracuti
ObjectiveHere we evaluated the hypothesis that resting state electroencephalographic (EEG) cortical sources correlated with cognitive functions and discriminated asymptomatic treatment-naïve HIV subjects (no AIDS).MethodsEEG, clinical, and neuropsychological data were collected in 103 treatment-naïve HIV subjects (88 males; mean age 39.8 years ± 1.1 standard error of the mean, SE). An age-matched group of 70 cognitively normal and HIV-negative (Healthy; 56 males; 39.0 years ± 2.0 SE) subjects, selected from a local university archive, was used for control purposes. LORETA freeware was used for EEG source estimation in fronto-central, temporal, and parieto-occipital regions of interest.ResultsWidespread sources of delta (< 4 Hz) and alpha (8-12 Hz) rhythms were abnormal in the treatment-naïve HIV group. Fronto-central delta source activity showed a slight but significant (p < 0.05, corrected) negative correlation with verbal and semantic test scores. So did parieto-occipital delta/alpha source ratio with memory and composite cognitive scores. These sources allowed a moderate classification accuracy between HIV and control individuals (area under the ROC curves of 70-75%).ConclusionsRegional EEG abnormalities in quiet wakefulness characterized treatment-naïve HIV subjects at the individual level.SignificanceThis EEG approach may contribute to the management of treatment-naïve HIV subjects at risk of cognitive deficits.



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