Inter- and Intra-Hemispheric EEG Connectivity in Healthy Subjects and Chronic Stroke Survivors

Brain connectivity has been assessed by phase indexes and other measures that rely or are based on Cross Power Spectral Density, normalizing it or taking only its imaginary part, leaving aside some interesting features that magnitude can describe differences for two kinds of populations. This paper shows the first results during resting state for a study that aims at describing the Interconnectivity between brain areas in stroke survivors through EEG while they played a game involving bimanual coordination. Resting state EEG recordings were collected from a control population of 13 people (8 Males, 5 Females; Age 29.15±5.57 y) and 10 stroke survivors (6 Males, 4 Females; Age 61,8±7,45 y), and analyzed with Power Spectral Density (PSD) and Cross Power Spectral Density (CPSD) from the EEGs. Results show that PSD and CPSD in Beta Band are promissory features able to differentiate between Controls and Stroke Survivors, being possible to describe these aspects for a brain with| motor challenges, even in the analysis of Inter- and Intra-hemispheric connectivity.