The location of electrodes for recording electroencephalograms from the scalp, nasopharyngeal, and external ear sites are shown. The leads placed on the zygomatic arch beneath the eye allow for monitoring of eye movements.
Adapted from: Jasper HH. Report of the committee on methods of clinical examination in electroencephalography: 1957. Electroencephalogr Clin Neurophysiol 1958; 10:370.