The effects of morphine and nalorphine on the jaw-opening reflex in rabbits.
D000818:Animals; D003864:Depression, Chemical; D005071:Evoked Potentials / Q000187:drug effects; D005260:Female; D008297:Male; D008410:Masticatory Muscles / Q000187:drug effects*; D009020:Morphine / Q000494:pharmacology*; D009119:Muscle Contraction / Q000187:drug effects; D009269:Nalorphine / Q000494:pharmacology*; D011817:Rabbits; D012018:Reflex / Q000187:drug effects*
D009020:Morphine; D009269:Nalorphine