Stability of non-linear electrical activity recorded in the EEG during baseline conditions with eyes closed

• Main Authors: Fernando Maureira Cid, Elizabeth Flores Ferro
• Format: Article
• Language: Spanish
• Published: Centro Nacional de Información de Ciencias Médicas. Editorial de Ciencias Médicas (ECIMED) 2020-07-01
• Series: Revista Cubana de Investigaciones Biomédicas
• Subjects: electroencefalografía; matemática no lineal; índice de hurst; estado de reposo; ojos cerrados
• Online Access: http://www.revibiomedica.sld.cu/index.php/ibi/article/view/626

Introduction: The electroencephalogram (EEG) allows to record the electrical activity of the brain at rest and during the performance of cognitive tasks. Aim: to determine whether brain activity, analyzed as non-linear dynamics, remains stable during different temporary windows in a basal condition with closed eyes. Methods: 14 male university students were registered with EEG for two minutes. Subsequently, Hurst (H) index averages were compared in temporary windows of 60, 30 and 10 seconds. Results: they show that the averages of the indices H are stable through different temporary windows in the prefrontal, temporal and occipital regions. Conclusion: EEG records at baseline with eyes closed are valid for comparing experimental cognitive problem solving protocols using non-linear mathematics such as the Hurst index.