Centre de recherche du CHU Sainte-Justine 2 articles published in JoVE Neuroscience Ex Utero Electroporation and Organotypic Slice Cultures of Embryonic Mouse Brains for Live-Imaging of Migrating GABAergic Interneurons Lara Eid1,2, Mathieu Lachance1, Gilles Hickson1,3, Elsa Rossignol1,2,4 1Centre de recherche du CHU Sainte-Justine, 2Department of Neuroscience, Université de Montréal, 3Department of pathology and cellular biology, Université de Montréal, 4Department of Pediatrics, Université de Montréal Here, we provide a low-cost and reliable method to generate electroporated brain organotypic slice cultures from mouse embryos suitable for confocal microscopy and live-imaging techniques. Neuroscience Preparation of Non-human Primate Brain Tissue for Pre-embedding Immunohistochemistry and Electron Microscopy Lara Eid1,2, Martin Parent1 1Centre de recherche de l'Institut universitaire en santé mentale de Québec, Department of Psychiatry and Neuroscience, Université Laval, 2Centre de recherche du CHU Sainte-Justine Here, we provide an easy, low-cost, and time-efficient protocol to chemically fix primate brain tissue with acrolein fixative, allowing for long-term preservation that is compatible with pre-embedding immunohistochemistry for transmission electron microscopy.