ラウンドコイルを用いた磁気刺激法による体性感覚誘発電位の検討

抄録

We recorded somatosensory evoked potentials (SEP) in 6 normal volunteers and 5 patients with spinal cord disorders by stimulating nerve roots with a round coil.
Amplitudes of normal volunteers' SEP were 2 to 4 times as large as those of electric stimulation. The waveshapes of all 5 patients' SEP had normal amplitudes and normal durations with stimulation of nerve roots above the lesions, and small amplitudes and long durations below the lesions.
SEP with electric stimulation is in common use for a diagnosis of C. N. S., but does not identify the level of the spinal cord lesion. In comparison, SEP with round coil magnetic stimulation can detect the level of the spinal cord lesion.