Literature review of stroke assessment for upper-extremity physical function via EEG, EMG, kinematic, and kinetic measurements and their reliability

Table 4 Summary of EEG signal power metrics and relationship to motor function or outcome in stroke

Metric	Stage	Correlation with clinical measures/findings [references]
Global Beta power Global Alpha power	Acute	First noticeable electrical changes during stroke [58], 105-day FIM FAM [53], 12-months NIHSS [96]
Delta power, Theta power	Sub-Acute	1-month NIHSS [52], 30 and 90 days mBI and mRS [121]
Delta-Alpha Ratio (DAR) Delta-Theta Ratio (DTR) (Delta + Theta)/(Alpha + Beta) Ratio (DTABR)	Sub-Acute	cognitive deficit [53], 90-days MoCA [54], 6-months mRS [105], 12 months NIHSS[96], 6-months FIM FAM [97], NIHSS evolution 3 weeks to 6-months [120]
Brain Symmetry Index (BSI) Pairwise derived brain symmetry index (pdBSI)	Sub-Acute	2-months FMA [104]*, 6-months mRS [125]
Global Delta	Chronic	motor therapy gains [122]
Delta-Alpha Ratio (DAR) Power Ratio Index (PRI)	Chronic	FMA evolution [99] No relation with FM-UE [125]
Brain Symmetry Index (BSI)	Chronic	FM-UE [125], directional BSI delta band correlated with FM-UE improvement and NIHSS evolution [120]

An extended version of this table that includes demographic information can be found in Table 11 in Appendix 1
*Records added manually

ISSN: 1743-0003