Swedish Neuroscience Insti 1 article published in JoVE Neuroscience Preparation of Acute Brain Slices Using an Optimized N-Methyl-D-glucamine Protective Recovery Method Jonathan T. Ting*1, Brian R. Lee*1, Peter Chong1, Gilberto Soler-Llavina1, Charles Cobbs2, Christof Koch1, Hongkui Zeng1, Ed Lein1 1Cell Types Program, Allen Institute for Brain Science, 2The Ben and Catherine Ivy Center for Advanced Brain Tumor Treatment, Swedish Neuroscience Institute This protocol demonstrates the implementation of an optimized N-methyl-D-glucamine (NMDG) protective recovery method of brain slice preparation. A single media formulation is used to reliably obtain healthy brain slices from animals of any age and for diverse experimental applications.