Enhancing the detection of VECP in response to a visual stimulus

Assume that the VECP records (1, 2, & 3) are recorded just before and after the presentation of a visual stimulus. Can you guess the location on these traces where the stimulus occurred? If you are having trouble locating the response to the stimulus look at curves 1a, 2a, & 3a. The arrow locates the position of the stimulus response in the VECP. If the average of the three traces is calculated, a function similar to that shown on the rights make the location of the evoked response more easy to identify.

Please be aware that these are not real data but only fictitious representations of data for illustrative purposes. For a more detailed account see the electrophysiology section of this book.

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