Abstract
Functional magnetic resonance imaging (fMRI) is an important tool for noninvasively imaging the hemodynamic responses accompanying brain activity, but fMRI measurements are accompanied by loud acoustic noises resulting from Lorentz forces that cannot be completely excluded when the present technology is used. We used recorded fMRI acoustic noise and examined its effect on sensorimotor activation in optical topography measurement when subjects were instructed to tap the fingers of the right hand under a 23-dB non-noise condition and 46-, 56-, and 65-dB noise conditions. The results showed that the amplitude of the activation signal (relative change in concentration) for oxygenated hemoglobin in the sensorimotor cortex decreased with increasing noise. The activation signal for deoxygenated hemoglobin did not depend significantly on the noise level but did tend to decrease with increasing noise. These results suggest that fMRI acoustic noise affects the hemodynamics of cortical areas associated with the processing of information other than auditory information.
| Original language | English |
|---|---|
| Pages (from-to) | 771-777 |
| Number of pages | 7 |
| Journal | NeuroImage |
| Volume | 32 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2006 Aug 15 |
| Externally published | Yes |
ASJC Scopus subject areas
- Neurology
- Cognitive Neuroscience
Cite this
Effect of fMRI acoustic noise on sensorimotor activation examined using optical topography. / Fuchino, Yutaka; Satou, Hiroki; Maki, Atsushi; Yamamoto, Yukari; Katura, Takusige; Obata, Akiko; Koizumi, Hideaki; Yoro, Takeshi.
In: NeuroImage, Vol. 32, No. 2, 15.08.2006, p. 771-777.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of fMRI acoustic noise on sensorimotor activation examined using optical topography
AU - Fuchino, Yutaka
AU - Satou, Hiroki
AU - Maki, Atsushi
AU - Yamamoto, Yukari
AU - Katura, Takusige
AU - Obata, Akiko
AU - Koizumi, Hideaki
AU - Yoro, Takeshi
PY - 2006/8/15
Y1 - 2006/8/15
N2 - Functional magnetic resonance imaging (fMRI) is an important tool for noninvasively imaging the hemodynamic responses accompanying brain activity, but fMRI measurements are accompanied by loud acoustic noises resulting from Lorentz forces that cannot be completely excluded when the present technology is used. We used recorded fMRI acoustic noise and examined its effect on sensorimotor activation in optical topography measurement when subjects were instructed to tap the fingers of the right hand under a 23-dB non-noise condition and 46-, 56-, and 65-dB noise conditions. The results showed that the amplitude of the activation signal (relative change in concentration) for oxygenated hemoglobin in the sensorimotor cortex decreased with increasing noise. The activation signal for deoxygenated hemoglobin did not depend significantly on the noise level but did tend to decrease with increasing noise. These results suggest that fMRI acoustic noise affects the hemodynamics of cortical areas associated with the processing of information other than auditory information.
AB - Functional magnetic resonance imaging (fMRI) is an important tool for noninvasively imaging the hemodynamic responses accompanying brain activity, but fMRI measurements are accompanied by loud acoustic noises resulting from Lorentz forces that cannot be completely excluded when the present technology is used. We used recorded fMRI acoustic noise and examined its effect on sensorimotor activation in optical topography measurement when subjects were instructed to tap the fingers of the right hand under a 23-dB non-noise condition and 46-, 56-, and 65-dB noise conditions. The results showed that the amplitude of the activation signal (relative change in concentration) for oxygenated hemoglobin in the sensorimotor cortex decreased with increasing noise. The activation signal for deoxygenated hemoglobin did not depend significantly on the noise level but did tend to decrease with increasing noise. These results suggest that fMRI acoustic noise affects the hemodynamics of cortical areas associated with the processing of information other than auditory information.
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U2 - 10.1016/j.neuroimage.2006.04.197
DO - 10.1016/j.neuroimage.2006.04.197
M3 - Article
VL - 32
SP - 771
EP - 777
JO - NeuroImage
JF - NeuroImage
SN - 1053-8119
IS - 2
ER -