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Updated: Jan 19, 2026

Reliable Acquisition of Electroencephalography Data during Simultaneous Electroencephalography and Functional MRI
Published on: March 19, 2021
Images: A Case of EEG Artifact By Proxy
Ang Li1, Camilla K Matthews2, David T Plante3
1Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.
Electroencephalography (EEG) artifact during sleep studies can be caused by a co-sleeping parent's heart monitor. This interference is a potential, under-recognized issue in pediatric sleep assessments.
Area of Science:
- Neurology
- Pediatrics
- Sleep Medicine
Background:
- Polysomnography is a crucial diagnostic tool for sleep disorders.
- Electroencephalography (EEG) is a key component of polysomnography, measuring brain activity.
- Artifacts can compromise the accuracy of EEG recordings.
Observation:
- A case study identified an electroencephalography (EEG) artifact during polysomnography.
- The artifact occurred while a mother was co-sleeping with her child.
- The parent's electrocardiography (ECG) signals were identified as the source of interference.
Findings:
- Co-sleeping can introduce electrocardiography (ECG) artifact into pediatric electroencephalography (EEG) recordings.
- This 'artifact by proxy' is a potential source of misinterpretation in sleep studies.
- The case highlights the need to consider environmental factors during polysomnography.
Implications:
- Clinicians should be aware of potential ECG interference from co-sleeping parents during pediatric polysomnography.
- Identifying and mitigating this artifact is essential for accurate sleep disorder diagnosis in children.
- Further research may be needed to quantify the prevalence and impact of this artifact.
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