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Typical recording from the 32 electrodes of SEPs derived from a single subject elicited by electrical stimulation of the right median nerve. aTop view of the head indicating locations of the electrodes; R right, L left. b Averaged SEPs when 10-Hz stimulation was applied. In this and the following figures, stimuli were delivered at 0 ms. A total of 12 blocks of the data (one block, 30 s) were averaged
