3 good questions and answers about "event-related potentials (ERPs)"

What does a event-related potentials (ERPs) measure?
It is an ongoing EEG triggered by sensory and cognitive events. They reflect the summed electrical activity of the neuronal population of those events.
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To which are ERPs typically named
Their electrical polarity (N=  neg p= pos) and their latency (time)
making  n100 = Negative peak 100 milliseconds after the stimulus onset
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What is the name of the following problem: a given distribution of electrical activity could have been produced by any one of a number of different sets of generators inside the head
The inverse problem
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