Animation through a Z-stack of confocal optical images, taken at 0.7-μm intervals with a standard 100× oil immersion lens, of a nigral section with cholinergic axons labeled in green and dopamine-containing fibers in red.
Jill R. Crittenden, Paul W. Tillberg, Michael H. Riad, Yasuyuki Shima, Charles R. Gerfen, Jeffrey Curry, David E. Housman, Sacha B. Nelson, Edward S. Boyden, and Ann M. Graybiel
PNAS. 2016. DOI: 10.1073/pnas.1613337113