| an instrument for measuring and recording the electric activity of the brain. |
electroencephalograph e·lec·tro·en·ceph·a·lo·graph (ĭ-lěk'trō-ěn-sěf'ə-lə-grāf')
n.
An instrument that generates a record of the electrical activity of the brain by measuring electric potentials using electrodes attached to the scalp.