Densities and 3D distributions of synapses using FIB/SEM imaging in the human hippocampus (CA1)

Synapses have been identified, segmented and quantified in the CA1 field of the human hippocampus with 3D electron microscopy (FIB-SEM). Pyramidal layer and stratum radiatum have been studied. 3 cases have been used (AB1, AB2, AB3) to achieve a total of 18 valid images stacks. Data include the number of asymmetric and symmetric synapses, their sizes and their spatial distribution.