Home › Neuroscience › Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy
Neuroscience JoVE (Open Access) Citable · DOI

Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

DOI: 10.3791/54883-v
What you'll learn
  • ✓ Record and detect high frequency oscillations (HFOs) using simultaneous MEG and EEG
  • ✓ Localize epileptogenic zones noninvasively in pediatric epilepsy patients
  • ✓ Identify interictal activity as a presurgical biomarker for medically refractory epilepsy
Protocol

High Frequency Oscillations (HFOs) have emerged as presurgical biomarkers for the identification of the epileptogenic zone in pediatric patients with medically refractory epilepsy. A methodology for the noninvasive recording, detection, and localization of HFOs with simultaneous scalp electroencephalography (EEG) and magnetoencephalography (MEG) is presented.

Difficulty
advanced
Total time
~60–90 minutes per patient recording session

Steps

1
Prepare pediatric patient for MEG/EEG recording

Position patient comfortably and apply scalp electrodes for simultaneous EEG acquisition. Ensure electrode placement follows standard 10–20 system for optimal signal capture during MEG recording.

▶ 01:22
2
Acquire simultaneous MEG and EEG data

Record magnetoencephalography and electroencephalography signals concurrently from the patient during resting state or natural sleep. Monitor data quality in real time to ensure adequate signal-to-noise ratio.

▶ 03:25
3
Identify interictal activity and detect HFOs

Analyze recorded data to identify interictal spikes and high frequency oscillations (typically 80–500 Hz). Apply signal processing and automated detection algorithms to localize HFO sources in the epileptogenic zone.

▶ 04:37
4
Localize HFO sources and evaluate results

Use source localization techniques to map detected HFOs to specific brain regions. Compare MEG and EEG localization results to identify the epileptogenic zone as a presurgical biomarker.

▶ 07:09
💬 Comments coming soon