Cortical sources of resting-state EEG rhythms are abnormal in naïve HIV subjects

Claudio Babiloni, Fabrizio Vecchio, Paola Buffo, Paolo Onorati, Chiara Muratori, Stefano Ferracuti, Paolo Roma, Michele Battuello, Nicole Donato, Paola Pellegrini, Francesco Di Campli, Laura Gianserra, Elisabetta Teti, Antonio Aceti, Paolo M. Rossini, Alfredo Pennica

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: The aim of the study was to test the hypothesis that cortical sources of resting-state electroencephalographic (EEG) rhythms show peculiar frequency/spatial features in naïve human subjects with human immunodeficiency virus (HIV) compared to healthy control subjects. Methods: Resting-state eyes-closed EEG data were recorded in 18 naïve HIV subjects (15 males; mean age 39. years ± 2.0 standard error of mean, SEM) and in 18 age-matched cognitively normal subjects (15 males; 38.7. years ± 2.2 SEM). EEG rhythms of interest were delta (2-4. Hz), theta (4-8. Hz), alpha1 (8-10. Hz), alpha2 (10-12. Hz), beta1 (13-20. Hz) and beta2 (20-30. Hz). Cortical EEG sources were estimated by normalised, low-resolution electromagnetic tomography (LORETA). Results: Mini Mental State Evaluation (MMSE) score was lower in HIV (26.5 ± 0.7 SEM) than in healthy (29.2 ± 0.5 SEM) subjects (p<0.05). Central and parietal delta sources showed higher amplitude in the HIV than in control subjects. Furthermore, topographically widespread, cortical sources of resting-state alpha rhythms were lower in amplitude in HIV subjects than in control subjects. Conclusions: The present results suggest that topography and frequency of the cortical sources of resting-state EEG rhythms can distinguish groups of HIV and control subjects. Significance: These results encourage future studies in an enlarged cohort of HIV subjects to test the hypothesis that the present methodological approach provides clinically useful information for an early detection of the effect of HIV infection on brain and cognitive functions.

Original languageEnglish
Pages (from-to)2163-2171
Number of pages9
JournalClinical Neurophysiology
Volume123
Issue number11
DOIs
Publication statusPublished - Nov 2012

Keywords

  • Alpha
  • Brain rhythms
  • Cognitive decline
  • Human immunodeficiency virus (HIV)
  • Low-resolution brain electromagnetic source tomography (LORETA)
  • Resting-state electroencephalography (EEG)

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology
  • Physiology (medical)
  • Sensory Systems

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