PMC:2944670 / 69000-69662 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/2944670","sourcedb":"PMC","sourceid":"2944670","source_url":"https://www.ncbi.nlm.nih.gov/pmc/2944670","text":"2Besides electrical activity, neural activity also produces other types of signals, such as magnetic and metabolic, that can be also measured non-invasively. Magnetic fields can be recorded with magnetoencephalography (MEG), while brain metabolic activity – reflected in changes in blood flow – can be observed with positron emission tomography (PET), functional magnetic resonance imaging (fMRI), and optical imaging (NIRS). Unfortunately, such alternative techniques require sophisticated equipment that can be operated only in special facilities. Moreover, techniques for measuring blood flow have long latencies and thus are less appropriate for interaction.","tracks":[]}