Book: Electrrophysiological brain 0.0 / 5 ? PsychologyExtra methods (Electrophysiological)UniversityNone Created by: CanveySamCreated on: 06-05-15 13:11 what do single cell recordings do? Measure the responsiveness of a neurone to a given stimulus (in terms of APs per second) 1 of 12 what is a grandmother cell? A hypothetical neurone that just responds to one particular stimulus 2 of 12 How are single cell recordings obtained? By implanting a small electrode (intra- or extra-cellular recording) and counting the APs produced (spikes per second) 3 of 12 Name three types of representation found at the neural level 1) Local 2) Fully distributed 3) sparse distributed 4 of 12 how does rate coding work? the informational content of a neuron may be related to the number of APs per second 5 of 12 how does temporal coding work? the synchrony of firing may be used by a population of neurons to code the same event 6 of 12 What happens when different EEG waves are averaged? The signal to noise ratio is enhanced and an event-related potential is observed. 7 of 12 What does exogenous mean? Related to properties of the stimulus 8 of 12 What does endogenous mean? Related to properties of the task 9 of 12 What is the Inverse problem in ERP research? The difficulty of locating the sources of electrical activity from measurements taken at the scalp 10 of 12 what is dipole modelling in ERP research? An attempt to solve the inverse problem; how many dipoles (regions of electrical activity) contribute to the signal recorded at the scalp 11 of 12 what does an MEG scanner measure? The magnetic fields produced by the electrical activity in the brain 12 of 12
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