# Magnetoencephalography **Domain:** Neuroimaging / Neural Interfaces **Doc Type:** Scientific Concept Node **Maturity:** Established **Related:** [[Non-Invasive BCI]], [[Multimodal Neural Data]], [[Brain Imaging Data Structure]] --- ## Definition **Magnetoencephalography (MEG)** measures magnetic fields generated by neuronal electrical activity. It provides high temporal resolution with useful source-localization capability but usually requires specialized sensors, shielding, and careful spatial registration. ## Standards context MEG is included among the non-invasive modalities addressed by [[wiki/ISO-IEC TS 27571-2026|ISO/IEC TS 27571:2026]] and has modality-specific representation in BIDS.