When using imaging techniques to study the brain researchers often have to weigh a trade-off between temporal and spatial resolution.
What is temporal and spatial resolution?
- In a nutshell, spatial resolution refers to a method's ability to pinpoint precisely which part of the brain is active, while temporal resolution refers to the method's capacity to pinpoint precisely when the activation occurred.
- fMRI is frequently referred to as the gold standard of spatial resolution since it can currently pinpoint precise activation foci with millimeter accuracy, however it is less effective at indicating when this activation occurred.
- The hallmark of temporal resolution, however, is EEG, which may achieve millisecond resolution since it is a measure of electrical activity that spreads almost immediately. However, pinpointing the location of that activity's genesis is something that EEG is not particularly good at.
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