title: Clinical electroencephalogram (EEG) evaluation is improved by the amplitude asymmetry index.
abstract: OBJECTIVE
  Better definition of normal amplitude asymmetry values on the classical EEG frequency bands.
  
  
  RESULTS
  EEG amplitude asymmetry index (AAI) is physiologically low in normal adults, differences usually lesser than 7%.
  
  
  CONCLUSIONS
  Persistent or intermittent amplitude asymmetry regional differences higher than 7% may be suggestive of pathology after adequate correlation with clinical data and EEG classical visual analysis.
authors.affiliation: Hospital São Luiz, Neurofisiologia Clínica, Neurofisiologia Clínica, São Paulo SP, Brasil;
authors.forename: Francisco José Carchedi
authors.initials: FJ
authors.lastname: Luccas
authors.affiliation: Hospital São Luiz, Neurofisiologia Clínica, Biomedicina, São Paulo SP, Brasil.
authors.forename: Thalita
authors.initials: T
authors.lastname: Bártolo
authors.affiliation: Hospital São Luiz, Neurofisiologia Clínica, Biomedicina, São Paulo SP, Brasil.
authors.forename: Nayara Lucio da
authors.initials: NL
authors.lastname: Silva
authors.affiliation: Hospital São Luiz, Neurofisiologia Clínica, Biomedicina, São Paulo SP, Brasil.
authors.forename: Barbara
authors.initials: B
authors.lastname: Cavenaghi
mesh_terms: D000328:Adult; D017677:Age Distribution; D000367:Age Factors; D001921:Brain / Q000502:physiology*; D001927:Brain Diseases / Q000175:diagnosis / Q000503:physiopathology; D001931:Brain Mapping / Q000379:methods; D004569:Electroencephalography / Q000379:methods* / Q000592:standards; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012015:Reference Standards; D012016:Reference Values; D015203:Reproducibility of Results; D055815:Young Adult