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(A) Ramified microglia in healthy rat cortex, following brain-injury microglia morphology rapidly changes (A–E). (B) Hyper-ramified, bushy microglia. (C) Activated microglia with fewer processes than either ramified form. (D) Fully activated microglia/infiltrating macrophages have no processes. (E) Rod microglia, this morphology has thin soma and polarized processes.
