Fig. 1.

Microglial cell morphology and classification. (A) Schematic of the timeline of study. (B) NAc and HPC coordinates. (C) Representative images from the NAc, dentate gyrus and CA1 regions of HPC. (D) Surveillant microglia (small body and long thin processes). (E) Primed microglia (larger body, thicker processes, secondary branching). (F) Transitional microglia (highly reduced branching, thickened processes, often elongated body). (G) Amoeboid microglia (enlarged body, with little to no branching).