Table 2.
Neuroimaging techniques used in the reviewed studies.
| Technique | N | % |
|---|---|---|
| Electrophysiological methods | 32 | 27.6 |
| EEG (standard) | 13 | 11.2 |
| ERP | 16 | 13.8 |
| ERSP | 1 | 0.9 |
| SSVEP | 2 | 1.7 |
| MRI | 70 | 60.3 |
| MRI (structural) | 15 | 12.9 |
| fMRI | 55 | 47.4 |
| NIRS | 8 | 6.9 |
| SPECT | 2 | 1.7 |
| PET | 2 | 1.7 |
| Doppler | 1 | 0.9 |
EEG, Electroencephalography; ERP, Event-related potentials; ERSP, Event-related spectral Dynamics; fMRI, Functional magnetic resonance imaging; MRI, Magnetic resonance imaging; NIRS, Near-infrared spectroscopy; PET, Positon emission tomography; SPECT, Single-photon emission computed tomography; SSVEP, Steady-state visual evoked potential.