Determination of neural state classification metrics from the power spectrum of human ECoG.
Brain electrical activity exhibits scale-free dynamics that follow power law scaling. Previous works have shown that broadband spectral power exhibits state-dependent scaling with a log frequency exponent that systematically varies with neural state. However, the frequency ranges which best characterize biological state are not consistent across brain location or subject. An adaptive piecewise linear fitting solution was developed to extract features for classification of brain state. Performance was evaluated by comparison to an a posteriori based feature search method. This analysis, using the 1/ƒ characteristics of the human ECoG signal, demonstrates utility in advancing the ability to perform automated brain state discrimination.
Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA. kelseym@mir.wustl.edu
Matthew
M
Kelsey
David
D
Politte
Ryan
R
Verner
John M
JM
Zempel
Tracy
T
Nolan
Abbas
A
Babajani-Feremi
Fred
F
Prior
Linda J
LJ
Larson-Prior
D000465:Algorithms; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods*; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D004569:Electroencephalography / Q000379:methods*; D006801:Humans; D010363:Pattern Recognition, Automated / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014851:Wakefulness / Q000502:physiology*