EEG Spectral Asymmetry Index for detection of depression at Individual and Fixed Frequency Bands
2013; Springer Nature; Linguagem: Inglês
10.1007/978-3-642-29305-4_154
ISSN1727-1983
AutoresAnna Suhhova, Maie Bachmann, Jaanus Lass, Kaire Aadamsoo, Ülle Võhma, Hiie Hinrikus,
Tópico(s)Neural and Behavioral Psychology Studies
ResumoThis study is aimed to compare the electroence- phalographic (EEG) spectral asymmetry index (SASI) calcu- lated at fixed and individual frequency bands. In addition, the possible age effect on SASI is analyzed. SASI is based on bal- ance between the powers of two special EEG frequency bands selected lower and higher of the EEG spectrum maximum and excluding the central frequency from the calculations. EEG recordings were carried out on a group of 18 depressive subjects, a group of 18 age matched controls and two groups of young controls (15 subjects in each). The individual and fixed SASI was calculated for 10 minute resting EEG signals from channel P3. The individual SASI differentiated the depressive subjects from all the other control groups. Fixed SASI was not so consistent and performed at poorer quality. The obvious age effect on SASI was not found, however, variances of results between control groups of different age decreased with individual tuning of frequency bands. Therefore, while using spectral asymmetry index for detection of depression or other mental disorders, the individual selection of EEG frequency bands is recommended.
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