B. Brain Mapping Techniques
1.  Functional Magnetic Resonance Imaging, fMRI
2.  Somatasensory Evoked Potential, SSEP
3.  Direct Cortical Stimulation
4.  Positron Emission Tomography, PET
5.  Magnetoencephalography, MEG
6.  Electroencephalography, EEG
a. Source of signal
b.  Measurement techniques
Columbia  fMRI