By Steven J. Luck
The event-related power (ERP) process, within which neural responses to particular occasions are extracted from the EEG, presents a robust noninvasive device for exploring the human mind. This quantity describes useful tools for ERP examine besides the underlying theoretical intent. It bargains researchers and scholars a necessary advisor to designing, accomplishing, and interpreting ERP experiments. This moment version has been thoroughly up to date, with extra fabric, new chapters, and extra available reasons. Freely to be had supplementary fabric, together with numerous online-only chapters, provide increased or complex therapy of chosen subject matters. the 1st 1/2 the ebook provides crucial heritage info, describing the origins of ERPs, the character of ERP parts, and the layout of ERP experiments. the second one 1/2 the ebook deals a close therapy of the most steps all for engaging in ERP experiments, overlaying such themes as recording the EEG, filtering the EEG and ERP waveforms, and quantifying amplitudes and latencies. all through, the emphasis is on rigorous experimental layout and comparatively easy analyses. New fabric within the moment variation contains whole chapters dedicated to elements, artifacts, measuring amplitudes and latencies, and statistical research; up to date assurance of recording applied sciences; concrete examples of experimental layout; and lots of extra figures. on-line chapters disguise such themes as overlap, localization, writing and reviewing ERP papers, and developing and working an ERP lab.
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Extra info for An Introduction to the Event-Related Potential Technique
As discussed in online chapter 14, ERPs can be used to create models of the distribution of activity over the cortical surface, but the actual image of the brain typically comes from MRI data. It is, of course, possible to plot the distribution of voltage over the scalp, but this makes ERPs a scalpoimaging technique rather than a neuroimaging technique. ERP waveforms are also images, but they are not neuroimages in any particularly meaningful sense. To avoid overpromising and underdelivering, I prefer to leave the term neuroimaging to research that more directly provides an image of the brain.
Copyright 1998 MIT Press. 1 What Does the Polarity of an ERP Component Mean? I am often asked whether it “means something” if a component is positive or negative. My response is that polarity depends on a combination of four factors: • Whether the postsynaptic potential is excitatory or inhibitory • Whether the postsynaptic potential is occurring in the apical dendrite or the basal dendrites and cell body • The location and orientation of the generator dipole with respect to the active recording electrode • The location of the reference electrode (which will be discussed in chapter 5) If you know three of these factors, then the polarity of the ERP can be used to infer the fourth factor.
North-Holland: Elsevier. Sutton, S. (1969). The specification of psychological variables in average evoked potential experiments. In E. Donchin & D. B. ), Averaged Evoked Potentials: Methods, Results and Evaluations (pp. 237–262). S. Government Printing Office. Vaughan, H. , Jr. (1969). The relationship of brain activity to scalp recordings of event-related potentials. In E. Donchin & D. B. ), Average Evoked Potentials: Methods, Results and Evaluations (pp. 45–75). S. Government Printing Office.