Effect of fMRI acoustic noise on sensorimotor activation examined using optical topography
- Resource Type
- Authors
- Atsushi Maki; Yutaka Fuchino; Akiko Obata; Hideaki Koizumi; Yukari Yamamoto; Hiroki Sato; Takeshi Yoro; Takusige Katura
- Source
- NeuroImage. 32(2)
- Subject
- Adult
Male
Sound Spectrography
Brain activity and meditation
Cognitive Neuroscience
Motor Activity
behavioral disciplines and activities
Signal
Fingers
Hemoglobins
Nuclear magnetic resonance
medicine
Reaction Time
Deoxygenated Hemoglobin
Humans
Noise level
Optical topography
Dominance, Cerebral
Sensorimotor cortex
Brain Mapping
medicine.diagnostic_test
Motor Cortex
Somatosensory Cortex
Magnetic Resonance Imaging
Noise
Neurology
Oxyhemoglobins
Auditory Perception
Female
Psychology
Functional magnetic resonance imaging
Arousal
Neuroscience
psychological phenomena and processes
Tomography, Optical Coherence
- Language
- ISSN
- 1053-8119
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.