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The phosphorylation of NMDA-receptor subunit 1 (pNR1) positive immunoreactivity in the trigeminal nucleus caudalis (TNC) at 2 hours after intracisternal drug infusion. (A) Vehicle (artificial CSF) control, (B) capsaicin (2.5 nmol), (C) capsaicin (Cap, 2.5 nmol)+BD1047 (BD, 100 nmol). Scale bar=200 µm.
