Topographic organization of the human primary and secondary somatosensory cortices

Comparison of fMRI and MEG findings

C. Del Gratta, S. Della Penna, A. Ferretti, R. Franciotti, V. Pizzella, A. Tartaro, K. Torquati, L. Bonomo, G. L. Romani, P. M. Rossini

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

We studied MEG and fMRI responses to electric median and tibial nerve stimulation in five healthy volunteers. The aim was to compare the results with those of a previous study using only fMRI on the primary and secondary somatosensory cortices in which the somatotopic organization of SII was observed with fMRI. In the present work we focus on the comparison between fMRI activation and MEG equivalent current dipole (ECD) localizations in the SII area. The somatotopic organization of SII was confirmed by MEG, with the upper limb areas located more anteriorly and more inferiorly than the lower limb areas. In addition a substantial consistency of the ECD locations with the areas of fMRI activation was observed, with an average mismatch of about 1 cm. MEG ECDs and fMRI activation areas showed comparable differences in SI.

Original languageEnglish
Pages (from-to)1373-1383
Number of pages11
JournalNeuroImage
Volume17
Issue number3
DOIs
Publication statusPublished - 2002

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Somatosensory Cortex
Magnetic Resonance Imaging
Tibial Nerve
Median Nerve
Upper Extremity
Lower Extremity
Healthy Volunteers

Keywords

  • Functional magnetic resonance
  • Magnetoencephalography
  • Primary and secondary somatosensory cortex

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Neurology

Cite this

Topographic organization of the human primary and secondary somatosensory cortices : Comparison of fMRI and MEG findings. / Del Gratta, C.; Della Penna, S.; Ferretti, A.; Franciotti, R.; Pizzella, V.; Tartaro, A.; Torquati, K.; Bonomo, L.; Romani, G. L.; Rossini, P. M.

In: NeuroImage, Vol. 17, No. 3, 2002, p. 1373-1383.

Research output: Contribution to journalArticle

Del Gratta, C, Della Penna, S, Ferretti, A, Franciotti, R, Pizzella, V, Tartaro, A, Torquati, K, Bonomo, L, Romani, GL & Rossini, PM 2002, 'Topographic organization of the human primary and secondary somatosensory cortices: Comparison of fMRI and MEG findings', NeuroImage, vol. 17, no. 3, pp. 1373-1383. https://doi.org/10.1006/nimg.2002.1253
Del Gratta, C. ; Della Penna, S. ; Ferretti, A. ; Franciotti, R. ; Pizzella, V. ; Tartaro, A. ; Torquati, K. ; Bonomo, L. ; Romani, G. L. ; Rossini, P. M. / Topographic organization of the human primary and secondary somatosensory cortices : Comparison of fMRI and MEG findings. In: NeuroImage. 2002 ; Vol. 17, No. 3. pp. 1373-1383.
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