Evaluation of various somatosensory stimulations for functional MRI

Kazushi Hara, Hiroaki Shimizu, Nobukazu Nakasato, Kazuo Mizoi, Takashi Yoshimoto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The aim of this functional magnetic resonance imaging (fMRI) study was to test detectability of activated area using various somatosensory stimulations. The following stimulations were performed in normal volunteers: regular or irregular electrical median nerve stimulation (n = 5, each), tactile stimulation to the palm and fingers (n = 8), pain stimulation to the index finger (n = 5) or to the palm and fingers (n = 5). fMRI was acquired with a spoiled gradient echo sequence at 1.5 T. Detectability of activated area was the highest when the pain stimulation was applied to the palm and fingers (80%). A successful rate for the tactile stimulation was 25%, and the other stimulations failed to demonstrate any activation. When successful, the highest signal activation on fMRI was seen on a sulcus which presumably arose from a vein. The sulcus was defined as the central sulcus by somatosensory evoked field using a median nerve stimulation. Our study indicates that the palm stimulation to the palm and fingers may be a choice for the sensory fMRI.

Original languageEnglish
Pages (from-to)65-68
Number of pages4
JournalBrain and Nerve
Volume49
Issue number1
Publication statusPublished - 1997 Jan 1

Keywords

  • functional magnetic resonance imaging
  • human
  • somatosensory evoked field
  • somatosensory stimulation

ASJC Scopus subject areas

  • Neuroscience(all)

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  • Cite this

    Hara, K., Shimizu, H., Nakasato, N., Mizoi, K., & Yoshimoto, T. (1997). Evaluation of various somatosensory stimulations for functional MRI. Brain and Nerve, 49(1), 65-68.