
Keywords: CB, cannabinoid; CNS, central nervous system; DPCPX, 8-cyclopentyl-1,3-dipropylxanthine; GABA, γ-aminobutyric acid; 5-HT, serotonin; i.c.v., intracerebroventricular; i.pl., intraplantar; i.t., intrathecal; i.v., intravenous; NA, noradrenaline; NLXM, nalox