A guide for functional magnetic resonance imaging
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![Figure 3: Schematic illustration of the origins of the BOLD effect in fMRI [46].](https://thumb-eu.123doks.com/thumbv2/123dok_br/17567722.817862/25.892.512.788.540.846/figure-schematic-illustration-origins-bold-effect-fmri.webp)
![Figure 4: Canonical hemodynamic response function (HRF). This is the typical BOLD response to a single, impulse stimulation [111]](https://thumb-eu.123doks.com/thumbv2/123dok_br/17567722.817862/26.892.240.674.479.780/figure-canonical-hemodynamic-response-function-typical-response-stimulation.webp)
![Figure 5: Signal enhancement by extravascular water protons, SEEP [122].](https://thumb-eu.123doks.com/thumbv2/123dok_br/17567722.817862/28.892.466.794.498.865/figure-signal-enhancement-extravascular-water-protons-seep.webp)
![Figure 6: Representation of a Voxel (volume element). Represented in red the voxels where functional activation was detected [145]](https://thumb-eu.123doks.com/thumbv2/123dok_br/17567722.817862/31.892.184.688.634.861/figure-representation-voxel-element-represented-functional-activation-detected.webp)
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