If a Meta AI model can read a brain-wide signal, why wouldn’t the brain?

This article explores the possibility that the brain may use its own magnetic fields to coordinate its global state, inspired by Meta's AI model that can decode brain magnetic fields into images and text. The brain's magnetic field could act as a low-latency analog representation of neural activity, read by magnetic crystals in the brain. The locus coeruleus, a brain region that releases norepinephrine, could act as a global write system that changes how the brain responds to stimuli. The article also discusses how air pollution may impact the brain's magnetic field and lead to issues like Alzheimer's disease.