Protocolo para la fijación y tinción de tejido cerebral humano post mortem optimizado para microscopía electrónica de...

Here, we present a protocol for generating postmortem human brain tissue samples suitable for volume electron microscopy (vEM) imaging via focused ion beam-scanning electron microscopy (FIB-SEM). We describe steps for immersion fixation, sectioning, long-term cryopreservation, and enhanced-contrast staining that produce samples suitable for high-resolution FIB-SEM. This approach generates ultrastructure of sufficiently high preservation to enable both dense and targeted three-dimensional (3D) reconstructions of cellular, subcellular, synaptic, and organellar features in postmortem human brain samples. For complete details on the use and execution of this protocol, please refer to Glausier et al.¹.