What are the common artifacts seen on neonatal electroencephalogram (EEG)?

Updated: Aug 20, 2019
  • Author: Samuel Koszer, MD; Chief Editor: Selim R Benbadis, MD  more...
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Answer

Answer

Common artifacts seen on neonatal EEG are as follows.

  • Cardiac

    • ECG and pulse (See the image below.)

      Artifacts and a low-voltage record. A full-term in Artifacts and a low-voltage record. A full-term infant aged 4 days with anoxia at birth and seizures. No spontaneous respirations occur. The record is low voltage with no activity of cerebral origin greater than 2 mV. All other activity can be accounted for by physiologic or nonphysiologic artifacts. ECG artifacts are diffuse. Pulse artifact is time locked to the ECG. An IV artifact occurs in multiple electrodes every 1.75 seconds and is most prominent in the right electrooculogram (REOG). The RESP channel demonstrates mechanical ventilation artifact.
    • Ballistocardiographic (movement of the head with heartbeat)

  • Body

    • Respiratory, twitches, and tremor (See the image below.)

      Twitching artifact. A full-term, 3-day-old infant Twitching artifact. A full-term, 3-day-old infant with anoxic encephalopathy and episodes of generalized twitching that last 1-2 seconds at a time. Muscle artifacts are seen in multiple electrodes and are particularly prominent in the EMG channel. After the twitch, the background attenuates and appears to be a state change rather than an electrographic seizure correlate.
  • Head

    • Vertical, horizontal, and rotatory head movements

    • Electrode "pops" and fontanelle-related pulsations

  • Face

    • Sucking, glossokinesthetic, eye movements and blinks, frontotemporal muscle contraction

  • Other

    • 60-Hz electrical

    • Electromechanical devices (eg, ventilators, IV drips) (See the image below.)

      Artifacts and a low-voltage record. A full-term in Artifacts and a low-voltage record. A full-term infant aged 4 days with anoxia at birth and seizures. No spontaneous respirations occur. The record is low voltage with no activity of cerebral origin greater than 2 mV. All other activity can be accounted for by physiologic or nonphysiologic artifacts. ECG artifacts are diffuse. Pulse artifact is time locked to the ECG. An IV artifact occurs in multiple electrodes every 1.75 seconds and is most prominent in the right electrooculogram (REOG). The RESP channel demonstrates mechanical ventilation artifact.

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