Miniscope offers window-like view of brain functions in action

https://www.laserfocusworld.com/science-research/article/14270618/miniscope-offers-windowlike-view-of-brain-functions-in-action

"tiny electrically tunable lens, curvature researchers manipulate via static voltage without causing rise in temperature. Used on mouse model, Mini2P shifted focal plane between surface and deeper cell layers within brain’s cortex, thanks to lens’ curvature... produces 3D structure recordings of brain tissue, can record along multiple planes in Z-axis (toward the top of the brain, ranging from axonal branches... allows study neural network activity at high resolution in naturally behaving animals"