Diagnostic Validity for Different Components of Pattern Shift Visual Evoked Potentials in Multiple Sclerosis

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Abstract
Visual evoked potentials, elicited by checkerboard-pattern reversal were recorded from multiple sclerosis patients with different probabilities of diagnosis. Latencies and amplitudes of the different components were analyzed for diagnostic validity. Latency of the main positive peak (P2) was the most sensitive parameter; in a few cases determination of P2 latency and interocular difference of this peak alone failed to detect involvement of the visual system. Additional evaluation of absolute latencies, asymmetries in latency and amplitudes of other components would give evidence in predicting abnormalities of the visual pathways.

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