uses diagnostic device measures Brain Electrical Activity Cerebral Function Assay Electroencephalograph Electroencephalography MESH:D004569 EEG http://purl.bioontology.org/ontology/MESH/D004569 Sufficient Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain. SCDO:0000420