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We have attempted to replicate the results of studies on a diagnostic test reported to have 90%sensitivity and 89-96%specificity for migraine.The technique is based on peak-to-peak measurements of fast background electroencephalographic activity during a visual evoked potential(VEP) study.VEP latencies and amplitudes did not differ significantly,and showed substantial overlap,between a group of eight migraine patients and ten age-matched healthy controls.We could not recognise previously described fast activity or measure it objectively by peak-to-peak measurements.We cannot confirm that measurement of fast wave activity in the VEP background is useful in diagnosis of migraine. |
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