Antinociception induced by acute oral administration of sweet substance in young and adult rodents: The role of endogenous opioid peptides chemical mediators and μ1-opioid receptorsRenato Freitas, João Marcus Lopes Kübler, Daoud Hibraim Elias-Filho, Norberto Cysne CoimbraPharmacology Biochemistry and Behavior2012The present work aimed to investigate the effects of acute sucrose treatment on the perception of painful stimuli. Specifically, we sought to determine the involvement of the endogenous opioid… (More)