Intra-periaqueductal gray matter administration of orexin-A exaggerates pulpitis-induced anxiogenic responses and c-fos expression mainly through the interaction with orexin 1 and cannabinoid 1 receptors in rats - Pourrahimi, A M; Abbasnejad, M; Esmaeili-Mahani, S; Kooshki, R; Raoof, M (Neuropeptides, 2019)