Polysomnography is the monitoring of various physiologic parameters simultaneously during sleep,6
21 including the following:
■ EEG: standard electrodes are used (see 14.11.2, Electroencephalographic Terms)
■ Electro-oculogram (EOG): tracings are obtained from the left eye and right eye
■ Electromyogram (EMG): submental (chin) EMG, leg muscle EMG, eg, left anterior tibialis, right anterior tibialis...