TY - GEN
T1 - Stationarity and variability in eyes open and eyes closed EEG signals from able-bodied and spinal cord injured persons
AU - Tran, Yvonne
AU - Thuraisingham, Ranjit
AU - Craig, Ashley
AU - Nguyen, Hung
PY - 2012
Y1 - 2012
N2 - This paper examines the assumption of stationarity used in EEG brain activity analyses, despite EEG data often being non-stationary. Transformations necessary to obtain stationary data from measured non-stationary EEG data and methods to assess non-stationarity are illustrated using eyes open (EO) and eyes closed (EC) data. The study shows that even short time EEG records of 10s duration exhibit non-stationary behavior. Examination of the change in variance when going from the EO to the EC state for both able bodied and spinal cord injured participants show that the difference in variance is consistently positive and statistically significant only when stationary data is used. This has implications for brain computer interfaces that utilizes changes in EO and EC EEG signals.
AB - This paper examines the assumption of stationarity used in EEG brain activity analyses, despite EEG data often being non-stationary. Transformations necessary to obtain stationary data from measured non-stationary EEG data and methods to assess non-stationarity are illustrated using eyes open (EO) and eyes closed (EC) data. The study shows that even short time EEG records of 10s duration exhibit non-stationary behavior. Examination of the change in variance when going from the EO to the EC state for both able bodied and spinal cord injured participants show that the difference in variance is consistently positive and statistically significant only when stationary data is used. This has implications for brain computer interfaces that utilizes changes in EO and EC EEG signals.
UR - http://www.scopus.com/inward/record.url?scp=84870800855&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/record.url?scp=84883033259&partnerID=8YFLogxK
U2 - 10.1109/EMBC.2012.6346560
DO - 10.1109/EMBC.2012.6346560
M3 - Conference proceeding contribution
C2 - 23366521
AN - SCOPUS:84883033259
SN - 9781424441198
T3 - Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference
SP - 2861
EP - 2864
BT - 2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2012
T2 - 34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2012
Y2 - 28 August 2012 through 1 September 2012
ER -