脳の機能を診る : 磁気生理学の臨床応用

概要

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Magnetoencephalography(MEG) and functional magnetic resonance imaging(fMRI) are non-invasive tools for functional brain imaging based on recent advances in biomagnetism and superconductivity technologies. MEG localizes the somatosensory, auditory, and visual cortices. Latency delay in the evoked responses can be used for quantitative evaluation of brain functions. MEG can be also used for diagnosis of abnormal brain activity such as in epilepsy, and provides accurate temporal and spatial resolution. fMRI has been applied to brain mapping in the last few years. The brain area activated by motor, sensor, visual, linguistic, and higher brain functions can be detected as MRI signal changes related to brain perfusion. fMRI provides imaging of multiple and wide functional areas of the brain. MEG and fMRI are complementary methods for functional brain mapping, and combination of these two modalities is ideal, especially for clinical applications.
社団法人日本磁気学会の論文
1998-10-01