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MethodsEffects

MEG

Characteristics

Spatial Resolution
2-5 mm
Temporal Resolution
< 1 ms
Maturity
Established
Invasiveness
Non-invasive

Uses magnetic field detection, no contact with patient required

Summary
MEG
Tags
Magnetic
Electromagnetic

Details

Magnetoencephalography (MEG) measures the magnetic fields generated by electrical activity in the brain using highly sensitive superconducting quantum interference devices (SQUIDs).

MEG offers excellent temporal resolution (millisecond precision) and good spatial resolution (2-5 mm) because magnetic fields are less distorted by the skull and scalp compared to electrical fields. The technique requires liquid helium cooling to maintain the superconducting sensors at extremely low temperatures.

MEG is particularly effective at detecting activity in the cortical layers of the brain and is widely used in both research applications and clinical settings, especially for pre-surgical mapping in epilepsy patients.

MEG

Neural current
Magnetic field
SQUID sensor
Liquid helium
Magnetic shielding

Literature Review

TitleSpatial Res.Temporal Res.SubjectsSummary

Using AI to decode language from the brain and advance human communication (2025)

This blog post describes Meta AI’s research on non‑invasive decoding of sentence production from human brain recordings, achieving up to 80 % character decoding accuracy and highlighting the potential for AI‑driven communication interfaces.

N/AN/AHumansThis blog post describes Meta AI’s research on non‑invasive decoding of sentence production from human brain recordings, achieving up to 80 % character decoding accuracy and highlighting the potential for AI‑driven communication interfaces.