Magnetoencephalography and functional MRI: A quantitative study of speech perception

T. P L Roberts, David Poeppel, H. A. Rowley

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

Abstract

Magnetoencephalography (MEG), sensitive to evoked neuronal activity, and functional magnetic resonance imaging (fMRI), sensitive to hemodynamic consequences of cortical activation, were compared in normal subjects, presented with simple speech elements (vowels). The subjects were instructed either to listen passively or to perform phonetic or pitch discrimination tasks. Sources of activation detected using the two technologies were found to co-localize in the superior temporal gyrus. Furthermore quantification of the evoked responses, using both techniques, revealed a task-induced bilateral increase in activation, with the greatest increases observed in the left hemisphere, during performance of the phonetic discrimination task. It is concluded that not only do fMRI and MEG indicate similar underlying cortical activation areas, but that they offer quantitative indices of hemispheric lateralization induced by performance of a linguistic task. Their co-variance with respect to hemisphere and task performance suggests that despite their different neurophysiological sensitivities (hemodynamic changes vs. neuronal electrical activity), both techniques offer quantitative approaches to the study of speech perception, and by extension, to the processing of language.

Original languageEnglish (US)
Title of host publicationAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
EditorsH.K. Chang, Y.T. Zhang
PublisherIEEE
Pages2120-2123
Number of pages4
Volume4
StatePublished - 1998
EventProceedings of the 1998 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 4 (of 6) - Hong Kong, China
Duration: Oct 29 1998Nov 1 1998

Other

OtherProceedings of the 1998 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 4 (of 6)
CityHong Kong, China
Period10/29/9811/1/98

Fingerprint

Magnetoencephalography
Chemical activation
Speech analysis
Hemodynamics
Linguistics
Magnetic Resonance Imaging
Processing

ASJC Scopus subject areas

  • Bioengineering

Cite this

Roberts, T. P. L., Poeppel, D., & Rowley, H. A. (1998). Magnetoencephalography and functional MRI: A quantitative study of speech perception. In H. K. Chang, & Y. T. Zhang (Eds.), Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings (Vol. 4, pp. 2120-2123). IEEE.

Magnetoencephalography and functional MRI : A quantitative study of speech perception. / Roberts, T. P L; Poeppel, David; Rowley, H. A.

Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. ed. / H.K. Chang; Y.T. Zhang. Vol. 4 IEEE, 1998. p. 2120-2123.

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

Roberts, TPL, Poeppel, D & Rowley, HA 1998, Magnetoencephalography and functional MRI: A quantitative study of speech perception. in HK Chang & YT Zhang (eds), Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. vol. 4, IEEE, pp. 2120-2123, Proceedings of the 1998 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 4 (of 6), Hong Kong, China, 10/29/98.
Roberts TPL, Poeppel D, Rowley HA. Magnetoencephalography and functional MRI: A quantitative study of speech perception. In Chang HK, Zhang YT, editors, Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. Vol. 4. IEEE. 1998. p. 2120-2123
Roberts, T. P L ; Poeppel, David ; Rowley, H. A. / Magnetoencephalography and functional MRI : A quantitative study of speech perception. Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. editor / H.K. Chang ; Y.T. Zhang. Vol. 4 IEEE, 1998. pp. 2120-2123
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