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Is ocular voltage propagation to the electroencephalogram frequency dependent?

Journal Article


Abstract


  • Conventional eye correction methods subtract portions (propagation coefficients; Bs) of electrooculogram (EOG) voltages from the electroencephalogram (EEG). The frequency domain approach (FDA) uses different Bs for different frequencies whereas the time domain approach (TDA) uses the same Bs. To determine whether measured Bs are dependent on frequency and whether one should employ frequency-dependent methods, 20 min of EEG from eye movement (EM) and blink data (24 participants) were recorded, and Bs were calculated for eye movement ERPs of differing signal-to-noise ratios for frequency bands ranging from 0 to 40 Hz and compared. At high signal to noise, EM Bs for different frequency bands did not differ, for both vertical and horizontal EOG, at all scalp sites tested. There were small differences in blink Bs for different bands, but smaller than the margin of error of this analysis. This indicates that TDA may be more appropriate than FDA.

Authors


  •   Pham, Trieu T.H. (external author)
  •   Croft, Rodney J.
  •   Cadusch, Peter (external author)

Publication Date


  • 2009

Citation


  • Pham, T., Croft, R. J. & Cadusch, P. (2009). Is ocular voltage propagation to the electroencephalogram frequency dependent?. Psychophysiology: an international journal, 46 (5), 949-956.

Scopus Eid


  • 2-s2.0-70349148268

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/3364

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 949

End Page


  • 956

Volume


  • 46

Issue


  • 5

Abstract


  • Conventional eye correction methods subtract portions (propagation coefficients; Bs) of electrooculogram (EOG) voltages from the electroencephalogram (EEG). The frequency domain approach (FDA) uses different Bs for different frequencies whereas the time domain approach (TDA) uses the same Bs. To determine whether measured Bs are dependent on frequency and whether one should employ frequency-dependent methods, 20 min of EEG from eye movement (EM) and blink data (24 participants) were recorded, and Bs were calculated for eye movement ERPs of differing signal-to-noise ratios for frequency bands ranging from 0 to 40 Hz and compared. At high signal to noise, EM Bs for different frequency bands did not differ, for both vertical and horizontal EOG, at all scalp sites tested. There were small differences in blink Bs for different bands, but smaller than the margin of error of this analysis. This indicates that TDA may be more appropriate than FDA.

Authors


  •   Pham, Trieu T.H. (external author)
  •   Croft, Rodney J.
  •   Cadusch, Peter (external author)

Publication Date


  • 2009

Citation


  • Pham, T., Croft, R. J. & Cadusch, P. (2009). Is ocular voltage propagation to the electroencephalogram frequency dependent?. Psychophysiology: an international journal, 46 (5), 949-956.

Scopus Eid


  • 2-s2.0-70349148268

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/3364

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 949

End Page


  • 956

Volume


  • 46

Issue


  • 5