Hm. The actual work where the data used was collected is here.[1] (The details are paywalled, unfortunately.) This paper is here.[2]
The first paper, about predicting where eyes will point next, is based on actual data recorded by the experimenters from two monkeys. The authors of that paper report positive but narrow results. They write about simple visual target info persisting for a few seconds. The second paper re-analyzes that data and draws much broader conclusions, less well justified by the data.
No electric fields were actually measured in that work. They're being imputed from voltages from neuron probes and EEG pickups. So the statements about fields are somewhat iffy.
It's recently become possible to image electric fields.[3] NASA work in 2015. A field-effect transistor with an open gate is an electric field sensor, and an array of them is an imager. A linear array was constructed and scanned mechanically to 2D image various objects, including a human. That paper has what is claimed to be the first image of the electric field of a human. Resolution was low, but it works. Might be useful for scanners at checkpoints and such, they claim.
So the technology exists to start to measure such fields directly. With enough interest and money, someone could probably construct an IC with a large array of open gate FETs and the readout circuitry to get an image from them. It's a non-intrusive passive sensor, which is nice for human experimentation. If there's anything going with the brain's electric field at high resolution or high frequency, it should be possible to pick that up. It's not clear how useful this is, but the electronics part looks possible.
The first paper, about predicting where eyes will point next, is based on actual data recorded by the experimenters from two monkeys. The authors of that paper report positive but narrow results. They write about simple visual target info persisting for a few seconds. The second paper re-analyzes that data and draws much broader conclusions, less well justified by the data.
No electric fields were actually measured in that work. They're being imputed from voltages from neuron probes and EEG pickups. So the statements about fields are somewhat iffy.
It's recently become possible to image electric fields.[3] NASA work in 2015. A field-effect transistor with an open gate is an electric field sensor, and an array of them is an imager. A linear array was constructed and scanned mechanically to 2D image various objects, including a human. That paper has what is claimed to be the first image of the electric field of a human. Resolution was low, but it works. Might be useful for scanners at checkpoints and such, they claim.
So the technology exists to start to measure such fields directly. With enough interest and money, someone could probably construct an IC with a large array of open gate FETs and the readout circuitry to get an image from them. It's a non-intrusive passive sensor, which is nice for human experimentation. If there's anything going with the brain's electric field at high resolution or high frequency, it should be possible to pick that up. It's not clear how useful this is, but the electronics part looks possible.
[1] https://iopscience.iop.org/article/10.1088/1741-2552/aa5a3e
[2] https://www.sciencedirect.com/science/article/pii/S105381192...
[3] https://sma.nasa.gov/docs/default-source/News-Documents/elec...