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Influence of magnetic resonance imaging on evoked potentials and nerve conduction velocities in humans.

The authors investigated the influence of a 1.0-T magnetic field of a magnetic resonance (MR) imaging device, as well as the possible effects of the changing magnetic field and the RF field, on somatosensory, visual, and auditory evoked potentials and on peripheral nerve conduction velocities. The neural potentials outside and inside the static magnetic field were recorded before and after MR imaging. The measured latencies before and after MR imaging were within the normal range for healthy volunteers. The magnetic field did not significantly alter central or peripheral conduction velocities.