Effects of intracerebroventricular injection of opioid peptides selective for μ, δ and κ receptors on discriminative stimulus properties of pentazocine in the rat
Endomorphins 1 and 2, endogenous μ-opioid receptor agonists, impair passive avoidance learning in mice
Effects of endomorphins-1 and -2, endogenous μ-opioid receptor agonists, on spontaneous alternation performance in mice
Effects of Tyr-d-Arg-Phe-β-Ala-NH2, a novel dermorphin analog, on elevated plus-maze learning and spontaneous alternation performance in mice
Stimulation of δ1- and δ2-opioid receptors produces amnesia in mice
