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.
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
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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