title: Fast extraction of somatosensory evoked potential based on second order blind identification.
abstract: Second order blind identification (SOBI) technique is a promising independent component analysis (ICA) method to extract somatosensory evoked potential (SEP). This simulation study focused on SEP extraction from EEG and power-line noise contaminated SEP signals at signal to noise ratio (SNR) of -10dB and -20dB. The correlation coefficients between template SEP and SOBI extracted SEP showed significant high similarity (r>0.76) at -10dB and mild acceptable similarity (r>0.6) at -20dB EEG contaminated SEP. However, SOBI extracted SEP showed good performance in power-line noise situation to achieve high correlation coefficients with template SEP (r=0.96). The fast extracted SEP showed stable amplitude and latency, which are almost identical with the SEP template. The results suggested that SOBI is an appropriate method to extract SEP from noisy background.
authors.affiliation: Department of Orthopaedics and Traumatology, the University of Hong Kong, Pokfulam Road, Hong Kong. hunterliu@hkusua.hku.hk
authors.forename: Hongtao
authors.initials: H
authors.lastname: Liu
authors.forename: Yong
authors.initials: Y
authors.lastname: Hu
authors.forename: C Q
authors.initials: CQ
authors.lastname: Chang
authors.forename: Keith D K
authors.initials: KD
authors.lastname: Luk
mesh_terms: D000465:Algorithms; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D004569:Electroencephalography / Q000379:methods*; D005073:Evoked Potentials, Somatosensory / Q000502:physiology*; D006801:Humans; D010363:Pattern Recognition, Automated / Q000379:methods*; D025341:Principal Component Analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity