5-Hydroxytryptamine 2A/2C receptors of nucleus raphe magnus and gigantocellularis/paragigantocellularis pars α reticular nuclei modulate the unconditioned fear-induced antinociception evoked by electrical stimulation of deep layers of the superior colliculus and dorsal periaqueductal grey matter - Oliveira, Ricardo Santos de; Oliveira, Rithiele Cristina de; Falconi-Sobrinho, Luiz Luciano; Soares Júnior, Raimundo da Silva; Coimbra, Norberto Cysne (Behavioural Brain Research, 2017)