Measurement of somatosensory evoked response using functional MR images and MEG

Keiji Iramina, Masato Yumoto, Kohki Yoshikawa, Hirotake Kamei, Shoogo Ueno

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


This study focuses on the comparison of characteristics of functional magnetic resonance imaging (fMRI) and magnetoencepalography (MEG). Activations of the primary somatosensory cortex were investigated using MEG and fMRI. A right thumb and a ring finger were Stimulated by the electrical current pulse. Both MEG and fMRI identified expected anatomical regions of primary somatosensory cortex. When the thumb and the ring finger were stimulated simultaneously, it was possible in fMRI to discriminate the area of the thumb and the ring finger in the primary somatosensory cortex. In MEG, a single current dipole model might fit with a sufficiently large correlation coefficient because two sources are closely located within 10mm. It is difficult to discriminate two closely located dipoles, if no initial information is given.

Original languageEnglish
Pages (from-to)4260-4262
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5 PART 2
Publication statusPublished - 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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