e·lec·tro·en·ceph·a·lo·graph 
(ĭ-lĕk′trō-ĕn-sĕfə-lə-grăf′)
(ĭ-lĕk′trō-ĕn-sĕfə-lə-grăf′)n.
An instrument that measures electrical potentials on the scalp and generates a record of the electrical activity of the brain. Also called encephalograph.
e·lec′tro·en·ceph′a·lo·graphic adj.
e·lec′tro·en·ceph′a·logra·phy (-lŏgrə-fē) n.