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The role of hippocampus and lateral hypothalamus (LH) in modulation of formalin-induced nociception has been established. The present study aims to examine the role of orexin receptors in the Cornu Ammonis 1 (CA1) region of hippocampus in modulation of the LH-induced antinociception in the orofacial formalin test. Male Wistar rats were unilaterally implanted with two cannulae into the LH and CA1....
It is widely established that the dopaminergic system has profound effects on pain modulation in different regions of the brain including the hippocampus, the salient area for brain functions. The orofacial region is one of the most densely innervated (by the trigeminal nerves) areas of the body susceptible to acute and chronic pains. In this study, we tried to examine the effects of dopamine receptors...
Orexin, which is mainly produced by orexin-expressing neurons in the lateral hypothalamus (LH), plays an important role in pain modulation. Both kinds of orexin-1 (Ox1) and orexin-2 (Ox2) receptors have been found at high density in the ventral tegmental area (VTA) and nucleus accumbens (NAc). However, the quantity of Ox1 receptors in the VTA is more than that in the NAc. Additionally, it seems that...
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