Abstract
The term “artifact” refers to any element of extra-cerebral origin which can be recorded in the EEG channels, disturbing the acquisition of the tracing. Artifacts may derive from many sources, internal or external to the patient, and have several characteristics that may suggest their origin. Both the technician and the physician should be able to recognize the artifacts, for the possibility of misinterpreting the examination. As a matter of fact, even though many artifacts are easily detectable, some may remind pathological graphoelements and, therefore, be the cause for incorrect EEG interpretation.
However, some artifacts are not considered a disturbance in the EEG recording, and they are instead considered useful for its interpretation. For example, eye movement artifacts, due to their typical morphology and localization, provide immediate information on the correct position of the electrodes, amplification parameters, and the patient’s emotional state and alertness; they are also useful in identifying the sleep stages. Sometimes, the ECG artifact can reveal cardiac arrhythmias. In epileptic patients, the appearance of muscular, ocular, or movement artifacts may indicate the seizure onset. In this chapter, the most common artifacts will be described, to give physicians and technicians the tools to detect and - possibility - to avoid their recording.
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References
Urigüen JA, Garcia-Zapirain B. EEG artifact removal-state-of-the-art and guidelines. J Neural Eng. 2015;12:031001.
Libenson MH. Electroencephalographic artifacts. In: Libenson MHPractical approach to electroencephalography. 1st; Philadelphia, Saunders Elsevier, pp 124–145, 2010.
Iwasaki M, Kellinghaus C, Alexopoulos AV, et al. Effects of eyelid closure, blinks, and eye movements on the electroencephalogram. Clin Neurophysiol. 2005;116:878–85.
Tatum WO, Reinsberger C, Dworetzky BA. Artifacts of recording and common errors in interpretation. In: Shomer DL, Lopes da Silva FH, editors. Niedermeyers electroencephalography: basic principles, clinical applications and related fields. 7th ed. New York: Oxford University Press; 2018. p. 266–316.
Acknowledgment
We wish to thank all our technicians (Liliana Barbagallo, Leonardo Davì, Daniela De Santis, Giuseppe Iannuzzi, Nicoletta Panella, Marco Tiribelli) and the neurophysiologist Patrizia Pulitano for their help in acquiring EEG artifacts samples.
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Brienza, M., Davassi, C., Mecarelli, O. (2019). Artifacts. In: Mecarelli, O. (eds) Clinical Electroencephalography. Springer, Cham. https://doi.org/10.1007/978-3-030-04573-9_8
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DOI: https://doi.org/10.1007/978-3-030-04573-9_8
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