| SAMP8 | Senescence accelerated mice prone 8 |
| SAMR1 | Senescence accelerated mice resistant 1 |
| M1 | Affective microglia |
| M2 | Protective microglia |
| MHWT | mechanical head withdrawal threshold |
| TNF-α | tumor-necrosis-factor-α |
| IL-10 | interleukin-10 |
| ICM | intra–cisterna magna |
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