EEG Biomarkers Related With the Functional State of Stroke Patients

Quantitative EEG parameters of Brain Symmetry Index (BSI) and Laterality Coefficient (LC) were assessed in healthy participants and individuals with stroke. Significant differences were observed between these groups where the stroke was Subcortical (P = 0.001), or Cortical+Subcortical in location (P = 0.019). No significant differences were found between the healthy group and those with Cortical stroke (P = 0.505). BSI analysis by gender in the healthy group showed statistical differences (P = 0.027). In the stroke group, the correlation between the BSI and the functional state of the upper extremity assessed by Fugl-Meyer Assessment (FMA) was also significant, ρ = −0.430 and P = 0.046. The correlation between the BSI and the FMA-Lower extremity was not significant (ρ = −0.063, P = 0.852). Similarly, the LC calculated in the alpha band has significative correlation with FMA of upper extremity (ρ = −0.623 and P < 0.001) and FMA of lower extremity (ρ = −0.509 and P = 0.026).Acknowledgement of the collaboration of the Government of Catalonia that partially supported this study with the Industrial Doctorates Plan (2017/DI/065). This study was also supported by the EEG-DDS project (E! 12274 – EUROSTARS), the SeizureAI project (E! 12946 – EUROSTARS