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. 2017 Mar 22;7(1):34–43. doi: 10.5498/wjp.v7.i1.34

Figure 2.

Figure 2

Evolution of neuroimaging studies, data analysis and theoretical frameworks. PEG: Pneumoencephalagraphy; CAT: Computed axial tomography; SPECT: Single-photon emission tomography; PET: Positron emission tomography; MRI: Magnetic resonance imaging; fMRI: Functional magnetic resonance imaging; MEG: Magneto encephalography; DMN: Default mode network.