Figure 6. Trigeminal nerve electrical stimulation (TNS) decreases interleukin (IL)-1β levels after traumatic brain injury (TBI) via orexin-A (OX-A)/orexin receptor 1 (OX1R). Representative immunofluorescence staining and relative mRNA levels of IL-1β. Results are expressed as mean ± standard deviation (SD; *P < 0.05, **P < 0.01, ***P < 0.001).