ERP and neuronal oscillations

9 important questions on ERP and neuronal oscillations

What are the two categories of ERP?

Even-related response and spontaneous activity

What is an evoked response?

Transient deflection in EEG/MEG signals caused by a stimulus cognitivie task or motor activity also known as ERP

What is baseline corrected?

It means that typically the signal in a pre-stimulus interval of 50-100 ms is defined to be zero (i.e., the mean of all samples in the pre-stimulus interval is subtracted from all samples of the entire evoked-response waveform).
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What is the speed of processing in humans?

150 ms

How much of the brain is ERP and how much is spontaneous?

95% spontaneous

How do macroscopic fields arise?

From spatial and temporal summation of EPSC's and IPSC"s

What is a quantitative EEG?

EEG used with a power spectrum or any other digital signal processing transformation

What is the nyquist sampling theorem?

Sampling freq is at least twice highest fq

What are slow negative cortical potentials?

Slow cortical potentials are negative or positive polarizations of the electroencephalo gram (EEG) or magnetic field changes in the magnetoencephalogram (MEG) that last from 300 ms to several seconds. They reflect depolarization of cortical shell assemblies, this increases their excitability

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