The tool — called “MouseGoggles” — could provide rodents with an improved virtual experience in the lab, at a lower cost than current techniques.

The collection offers a glimpse into differences in cell composition — across people and brain regions — that may shape neural function.

The new devices, which monitor neural activity from within blood vessels, show long-term stability in rats and could one day deliver electrical stimulation.

The tool could help researchers study the neurobiology of natural behaviors, scientists say.

The tool connects to electrodes implanted in people with epilepsy or other brain conditions and can monitor and regulate neurons during everyday activities.