Single-trial multiwavelet coherence in application to neurophysiological time series.
A method of single-trial coherence analysis is presented, through the application of continuous multiwavelets. Multiwavelets allow the construction of spectra and bivariate statistics such as coherence within single trials. Spectral estimates are made consistent through optimal time-frequency localization and smoothing. The use of multiwavelets is considered along with an alternative single-trial method prevalent in the literature, with the focus being on statistical, interpretive and computational aspects. The multiwavelet approach is shown to possess many desirable properties, including optimal conditioning, statistical descriptions and computational efficiency. The methods are then applied to bivariate surrogate and neurophysiological data for calibration and comparative study. Neurophysiological data were recorded intracellularly from two spinal motoneurones innervating the posterior biceps muscle during fictive locomotion in the decerebrated cat.
Brittain
John-Stuart
JS
Department of Electronics, University of York, YO10 5DD, UK.
Halliday
David M
DM
Conway
Bernard A
BA
Nielsen
Jens Bo
JB
D000818:Animals; D002415:Cats; D003627:Data Interpretation, Statistical; D005583:Fourier Analysis; D006801:Humans; D008124:Locomotion / Q000502:physiology; D008839:Microelectrodes; D008962:Models, Theoretical; D009046:Motor Neurons / Q000502:physiology; D009482:Neurophysiology / Q000706:statistics & numerical data*; D012815:Signal Processing, Computer-Assisted; D013569:Synapses / Q000502:physiology; D013997:Time Factors