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The phosphorylation of NMDA-receptor subunit 1 (pNR1) immunoreactivity in the trigeminal nucleus caudalis (TNC) at 2 hours after intracisternal capsaicin or vehicle infusion. BD1047 was introduced 10 min prior to capsaicin infusion. *p<0.05, **p<0.01 compared to vehicle control group (first column). #p<0.05, ##p<0.01 compared to capsaicin group (second column). Each group contains 6 animals.
