Figure 2. Somatosensory-evoked magnetic fields (SEFs) for stimuli to the right median nerve (A), and the right upper anterior areas of the lip (B), the gingiva (C), and the tongue (D). The left column shows waveforms of the channel of maximum signal amplitude. The right column shows isofield maps at peak latency. Arrows indicate the intracranial current source estimated by the magnetic field pattern. (E) Equivalent current dipoles (ECDs) of SEFs superimposed on the magnetic resonance images of the subject. Circles and bars indicate ECD location and orientation, respectively.