Non-invasive Measurement of Oscillatory Brain Activity

Oscillatory brain activity was measured non-invasively by MEG [14 (link)]. The average time between MEG recording and surgery was 8.4 weeks. Recording and preprocessing methods have been published before [15 (link), 16 (link), 18 (link)] and are explained in detail in the supplementary material. In short, patients underwent a 5-min eyes-closed resting state recording using a 306-channel MEG system (Elekta Neuromag Oy, Helsinki, Finland). Patients’ anatomical MRIs were co-registered to the MEG and 78 cortical parcels were selected for analyses [19 (link), 20 (link)]. The MEG time-series were then reconstructed using a scalar beamformer implementation (Elekta Neuromag Oy, version 2.1.28). As a non-invasive measure of neuronal activity, we calculated broadband (0.5–48 Hz) oscillatory power [13 (link)].

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Derks J., Wesseling P., Carbo E.W., Hillebrand A., van Dellen E., de Witt Hamer P.C., Klein M., Schenk G.J., Geurts J.J., Reijneveld J.C, & Douw L. (2018). Oscillatory brain activity associates with neuroligin-3 expression and predicts progression free survival in patients with diffuse glioma. Journal of Neuro-Oncology, 140(2), 403-412.

Publication 2018

306-channel MEG system

Brain Cortical Eyes Mris Neuronal Patients Surgery

Corresponding Organization :

Other organizations : Amsterdam UMC Location VUmc, University Medical Center Utrecht, Heidelberg University, University Hospital Heidelberg, Amsterdam Neuroscience

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Oscillatory brain activity measured non-invasively by MEG

control variables

Patients underwent a 5-min eyes-closed resting state recording using a 306-channel MEG system (Elekta Neuromag Oy, Helsinki, Finland)
Patients' anatomical MRIs were co-registered to the MEG and 78 cortical parcels were selected for analyses

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No positive or negative controls were explicitly mentioned in the provided information.

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