Complex valued equivalent-current dipole fits for MEG responses

Yadong Wang, Nayef E. Ahmar, Juanjuan Xiang, Ling Ma, David Poeppel, Jonathan Z. Simon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Complex numbers appear naturally in biological systems in the context of the Fourier transform. In particular, physiological magnetic field data from whole head magneto-encephalography (MEG) is complex after a Fourier transform. The whole-head MEG Steady State Response (SSR) to a stationary modulated stimulus results in a complex magnetic field for each MEG channel, from the frequency corresponding to that of the stimulus modulation. This complex data set is used to estimate the neural current sources generating the magnetic field, naturally leading to complex current sources. We show that standard inverse methods of estimating the current sources, such as the single equivalent-current dipole, generalize to complex sources in a useful and straightforward manner. The usage and utility of the complex magnetic field and the complex neural current source are demonstrated using examples from auditory SSR experiments.

Original languageEnglish (US)
Title of host publication2nd International IEEE EMBS Conference on Neural Engineering, 2005 - Conference Proceedings
Pages273-276
Number of pages4
Volume2005
DOIs
StatePublished - 2005
Event2nd International IEEE EMBS Conference on Neural Engineering, 2005 - Arlington, VA, United States
Duration: Mar 16 2005Mar 19 2005

Other

Other2nd International IEEE EMBS Conference on Neural Engineering, 2005
CountryUnited States
CityArlington, VA
Period3/16/053/19/05

Fingerprint

Magnetoencephalography
Magnetic fields
Fourier transforms
Biological systems
Modulation
Experiments

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Wang, Y., Ahmar, N. E., Xiang, J., Ma, L., Poeppel, D., & Simon, J. Z. (2005). Complex valued equivalent-current dipole fits for MEG responses. In 2nd International IEEE EMBS Conference on Neural Engineering, 2005 - Conference Proceedings (Vol. 2005, pp. 273-276). [1419610] https://doi.org/10.1109/CNE.2005.1419610

Complex valued equivalent-current dipole fits for MEG responses. / Wang, Yadong; Ahmar, Nayef E.; Xiang, Juanjuan; Ma, Ling; Poeppel, David; Simon, Jonathan Z.

2nd International IEEE EMBS Conference on Neural Engineering, 2005 - Conference Proceedings. Vol. 2005 2005. p. 273-276 1419610.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wang, Y, Ahmar, NE, Xiang, J, Ma, L, Poeppel, D & Simon, JZ 2005, Complex valued equivalent-current dipole fits for MEG responses. in 2nd International IEEE EMBS Conference on Neural Engineering, 2005 - Conference Proceedings. vol. 2005, 1419610, pp. 273-276, 2nd International IEEE EMBS Conference on Neural Engineering, 2005, Arlington, VA, United States, 3/16/05. https://doi.org/10.1109/CNE.2005.1419610
Wang Y, Ahmar NE, Xiang J, Ma L, Poeppel D, Simon JZ. Complex valued equivalent-current dipole fits for MEG responses. In 2nd International IEEE EMBS Conference on Neural Engineering, 2005 - Conference Proceedings. Vol. 2005. 2005. p. 273-276. 1419610 https://doi.org/10.1109/CNE.2005.1419610
Wang, Yadong ; Ahmar, Nayef E. ; Xiang, Juanjuan ; Ma, Ling ; Poeppel, David ; Simon, Jonathan Z. / Complex valued equivalent-current dipole fits for MEG responses. 2nd International IEEE EMBS Conference on Neural Engineering, 2005 - Conference Proceedings. Vol. 2005 2005. pp. 273-276
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