Miniscope Zero: a fully wireless, single-cell-resolution miniature microscope for imaging neural dynamics in freely behaving animals

Imaging neural activity in animals as they move freely is a significant challenge in neuroscience research. Head-mounted microscopes allow for in vivo recordings, but their power demands often require tethering or heavy batteries, which can limit experiments and potentially introduce artifacts.

Researchers have developed Miniscope Zero, a completely wireless miniature microscope designed to address these issues. This innovative system uses quasistatic cavity resonance (QSCR) wireless power transfer to provide 500 milliwatts of receiver power within a 2,500 square centimeter behavioral arena. Additionally, Miniscope Zero features a high-bandwidth optical data link capable of streaming imaging data at 8 megabits per second, enabling real-time data acquisition.

The platform offers a typical field of view measuring 600 millimeters by 600 millimeters, with a 2.6 times higher light-collection efficiency compared to the UCLA Miniscope v4. The researchers successfully demonstrate the use of Miniscope Zero to record calcium imaging from long-tailed pyramidal neurons (CA1 GCaMP6f) during various behaviors, including open-field navigation, enclosed-maze exploration, simultaneous multi-animal imaging, and extended three-dimensional behavior.

By providing cellular-resolution imaging without the constraints imposed by tethers, Miniscope Zero opens up new possibilities for neuroscience experiments, allowing researchers to study neural dynamics in freely behaving animals for extended periods.